Scan color or B/W better for B/W printing?
2008-08-19 by m_misiaszek
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2008-08-19 by m_misiaszek
I shoot 35mm film and want to print in B/W. Typically, what would give the better B/W print in the end, shooting in color or in B/W? I understand that Digital ICE does not work when scanning in B/W so it would take some more time correcting dust in software. While I would like to think it would be dust free I know that is effectively impossible. ~Mary
2008-08-19 by Joost Horsten
--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "m_misiaszek" <m_misiaszek@...> wrote: Actually, these are two different questions: how to shoot and how to scan. I have no personal experience in this, so this is just my 2 cents. To my knowledge common wisdom is to shoot in black& white, to scan in color and use only the color channel that gives the best result. However, I know people that shoot in color because they like to be able to control the BW conversion color mixing in Photoshop (and not while shooting). Good luck Joost > > I shoot 35mm film and want to print in B/W. Typically, what would give
> the better B/W print in the end, shooting in color or in B/W? I > understand that Digital ICE does not work when scanning in B/W so it > would take some more time correcting dust in software. While I would > like to think it would be dust free I know that is effectively > impossible. > ~Mary >
2008-08-19 by pr_roark
Mary, > I shoot 35mm film and want to print in B/W. > Typically, what would give the better B/W print in the end, > shooting in color or in B/W? ... B&W film will usually give you a better image than color film converted to B&W. Slide film has too little latitude to do a good job in many cases. Color negative film has the latitude, but is not as sharp as a good silver grain B&W film such as Tmax 100. Also, if you "filter" the image in Photoshop -- for example, using the red image as a substitute for a red filter -- the grain becomes much worse. Color film depends on the multiple emulsions to smooth out the grain. It was this last factor that caused me to abandon my use of the best color negative film I could buy. I'd thought it would be useful to do in-computer, multiple color filtering for B&W. However, the "filtered" skies were unacceptably grainy. Good luck with your B&W. Paul www.PaulRoark.com
2008-08-19 by pr_roark
>...common wisdom is to shoot in black& white, to scan in > color and use only the color channel that gives the best result. ... That probably depends on the scanner. We used to scan in RGB in order to overcome the 8 bit limit of the old, cheap scanners. However, a good scanner with high bit depth should be excellent in grayscale mode. However, with my Nikon 8000 I find I have to scan with the Nikon driver set to "positive" to avoid clipping the ends of the histogram. I develop (Tech Pan) to a higher contrast than the driver assumes for negatives. So, by telling the driver it's a "positive" (slide film, presumeably), even though I also set the driver to "grayscale," the driver gives me its full dynamic range capabilities. I then adjust the histogram manually. It works well. Paul www.PaulRoark.com
2008-08-19 by Bruce Watson
m_misiaszek wrote: > I shoot 35mm film and want to print in B/W. Typically, what would give > the better B/W print in the end, shooting in color or in B/W? I > understand that Digital ICE does not work when scanning in B/W so it > would take some more time correcting dust in software. While I would > like to think it would be dust free I know that is effectively > impossible. > ~Mary > It's a complex question. Largely it depends on what you want. Of course. All other things being equal, B&W film for a given ISO will be sharper and less grainy than the color negative film counterpart. If you like enlargements bigger than, say, 10x or so, this might matter to you. The reason for this is in the construction of the film. Color film can have dozens of layers, and the graininess adds as the enlarger or scanner has to look though them all to capture the image. B&W film has far fewer layers. But... in B&W the image is formed from metallic silver. This leads directly to the Callier Effect which effects both enlarger and scanner. In color films, positive or negative, the image is formed by translucent dyes. Color films have interesting features, but don't exhibit Callier Effect. Then there's graininess, and perceived graininess. Graininess is a function of density. In areas of low density there is very little graininess, while areas of high density exhibit considerably more graininess. In trannies, this means that the graininess is in the shadows where it's hardest to see. In negative films, color and B&W, it's in the highlights where it's easier to see. Even though most modern negative films have lower graininess ratings then their similar ISO tranny counterparts, the tranny can be *perceived* to be less grainy -- a property of perception. All of this (and more that I just can't be bothered to talk about) before you even consider scanning. And the various scanners all interact differently with the different films. Some seem to be optimized more for trannies. Some are more tolerant of negatives. The same is true for the software that drives said scanners. In the end, and you knew it would come to this, you'll have to do the work yourself to find out which film works best for your style of photography, your equipment, and your workflow. No one can tell you which is actually going to be your favorite -- only you can make that call. That said, if I want B&W prints, I always shoot B&W film. The extra sharpness and ability to capture detail matters to me. But clearly YMMV. -- Bruce Watson
2008-08-19 by Peter De Smidt
I'm just in the process of testing three films in 4x5: E100G (positive color), Portra 160NC (negative color) and TMX100 (bw). I will scan the images and see what I like better, and I'll be happy to report the results. I'll send the color film off to the lab tomorrow, and so I won't have any results until next week.
2008-08-20 by fredfischer77
--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Bruce Watson <bwyg@...> wrote: > > m_misiaszek wrote: > > I shoot 35mm film and want to print in B/W. Typically, what would give > > the better B/W print in the end, shooting in color or in B/W? I > > understand that Digital ICE does not work when scanning in B/W so it > > would take some more time correcting dust in software. While I would > > like to think it would be dust free I know that is effectively > > impossible. > > ~Mary > > > It's a complex question. Largely it depends on what you want. Of course. > > All other things being equal, B&W film for a given ISO will be sharper > and less grainy than the color negative film counterpart. If you like > enlargements bigger than, say, 10x or so, this might matter to you. The > reason for this is in the construction of the film. Color film can have > dozens of layers, and the graininess adds as the enlarger or scanner has > to look though them all to capture the image. B&W film has far fewer layers. > > But... in B&W the image is formed from metallic silver. This leads > directly to the Callier Effect which effects both enlarger and scanner. > In color films, positive or negative, the image is formed by translucent > dyes. Color films have interesting features, but don't exhibit Callier > Effect. > > Then there's graininess, and perceived graininess. Graininess is a > function of density. In areas of low density there is very little > graininess, while areas of high density exhibit considerably more > graininess. In trannies, this means that the graininess is in the > shadows where it's hardest to see. In negative films, color and B&W, > it's in the highlights where it's easier to see. Even though most modern > negative films have lower graininess ratings then their similar ISO > tranny counterparts, the tranny can be *perceived* to be less grainy -- > a property of perception. > > All of this (and more that I just can't be bothered to talk about) > before you even consider scanning. And the various scanners all interact > differently with the different films. Some seem to be optimized more for > trannies. Some are more tolerant of negatives. The same is true for the > software that drives said scanners. > > In the end, and you knew it would come to this, you'll have to do the > work yourself to find out which film works best for your style of > photography, your equipment, and your workflow. No one can tell you > which is actually going to be your favorite -- only you can make that call. > > That said, if I want B&W prints, I always shoot B&W film. The extra > sharpness and ability to capture detail matters to me. But clearly YMMV. > -- > Bruce Watson Hi Bruce I believe grainer hilites are a product of development. Hilite areas tend to exhaust or have slower development activity, because of the large amount of exposure they receive, creating a larger "grain" where as shadow areas develop more fully. this really holds true with "silver solvent" developers like D76.
2008-08-20 by Harry Lockwood
--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "m_misiaszek" <m_misiaszek@...> wrote: > > I shoot 35mm film and want to print in B/W. Typically, what would give > the better B/W print in the end, shooting in color or in B/W? I > understand that Digital ICE does not work when scanning in B/W so it > would take some more time correcting dust in software. While I would > like to think it would be dust free I know that is effectively > impossible. > ~Mary > I too only print B&W. But my workflow is to shoot C41 B&W (mostly Ilford XP2) rather than color. I scan, with ICE, in RGB then convert to Lab and toss the a and b channels. I then convert to Grayscale and adjust the black and white points. I gave up on silver film, partly because of the dust problem. I also like XP2 because of its wide latitude. The XP2 is developed by a reliable local shop which also provides a CD of jpegs (no prints), all for US $10. The snaps at http://www.pbase.com/hlockwood/folio_2 were all processed this way. Harry
2008-08-20 by Bruce Watson
fredfischer77 wrote: > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Bruce Watson <bwyg@...> wrote: > Hi Bruce > > I believe grainier highlights are a product of development. Highlight areas tend to exhaust or have slower development activity, because of the large amount of exposure they receive, creating a larger "grain" where as shadow areas develop more fully. This really holds true > with "silver solvent" developers like D76. > Interesting theory which holds some truth if you are talking about stand or semi-stand development where the point is to induce developer exhaustion in the highlights. For normal agitation however development doesn't exhaust anywhere on the film. That is actually the point of normal agitation -- to prevent developer exhaustion. Grain clumps vary widely in size depending on exposure and subsequent development. One of the reasons for this is the 3D nature of the emulsion. More exposure means that photons transit deeper into the emulsion. When developed to metallic silver, the individual grains overlap forming a larger overall grain clump. If you want to see some photomicrograms, have a look here: http://aic.stanford.edu/sg/emg/library/pdf/vitale/2006-03-vitale-filmgrain_resolution.pdf Mr. Vitale has been researching this and other film topics for decades. There's way more information here than most people want to know. But it all makes sense, and other researchers like Kodak's Grant Haist back him up. I specifically refer you to page 17, figure 18-D which shows an excellent example of grain clumping. -- Bruce Watson
2008-08-20 by fredfischer77
--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Bruce Watson <bwyg@...> wrote: > > fredfischer77 wrote: > > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Bruce Watson <bwyg@> wrote: > > Hi Bruce > > > > I believe grainier highlights are a product of development. Highlight areas tend to exhaust or have slower development activity, because of the large amount of exposure they receive, creating a larger "grain" where as shadow areas develop more fully. This really holds true > > with "silver solvent" developers like D76. > > > > Interesting theory which holds some truth if you are talking about stand > or semi-stand development where the point is to induce developer > exhaustion in the highlights. For normal agitation however development > doesn't exhaust anywhere on the film. That is actually the point of > normal agitation -- to prevent developer exhaustion. > > Grain clumps vary widely in size depending on exposure and subsequent > development. One of the reasons for this is the 3D nature of the > emulsion. More exposure means that photons transit deeper into the > emulsion. When developed to metallic silver, the individual grains > overlap forming a larger overall grain clump. If you want to see some > photomicrograms, have a look here: > > http://aic.stanford.edu/sg/emg/library/pdf/vitale/2006-03-vitale- filmgrain_resolution.pdf > > Mr. Vitale has been researching this and other film topics for decades. > There's way more information here than most people want to know. But it > all makes sense, and other researchers like Kodak's Grant Haist back him > up. > > I specifically refer you to page 17, figure 18-D which shows an > excellent example of grain clumping. > -- > Bruce Watson > Continuous processing (Jobo, Wing-Lynch, roller transport) has somewhat the same "grainer highlight" effect as the soluble halides, which are released in development, act as restrainers, again slowing highlight development, and also the shorter development times of that type of process. Hand process, dip and dunk all have a "stand" time just for restraining reasons. Different B&W films have different amounts of iodides/bromides (restrainers) built into them as a control. I have noticed that film developed in Rodinal seems to have fairly uniformed grain size regardless of exposure. Again this is a different developer (p-Aminophenol) that makes a very sharp, high acutance image. The high dilution (1:25, 1:50) exhaust quickly in highlight areas during the recommended stand times acting as restraint. I will refer you to "Photographic Materials and Processes" page 273 (7.40) which has 4 authors, and, although I could give a educated guess to who wrote what, the book is strong enough to stand on its own. F Fischer
2008-08-21 by m_misiaszek
Well there certainly are a lot of variables to consider. Paul said: " I > develop (Tech Pan) to a higher contrast than the driver assumes for > negatives. So, by telling the driver it's a "positive" (slide film, > presumeably), even though I also set the driver to "grayscale," the > driver gives me its full dynamic range capabilities. I then adjust the > histogram manually. It works well." Paul, sorry, but I am not sure what you mean by "developing". Do you mean *darkroom* development, or something to do with the scanning part. Harry, you brought up the C41 B&W, essentially throwing in an entirely different option I had not even considered but one that sounds interesting as well. Peter, yes, please do report back on the results of your test with the color slides/negs and B&W negs. Thanks all for the comments and education. Much appreciated! ~Mary
2008-08-21 by pr_roark
--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "m_misiaszek" <m_misiaszek@...> wrote: > ... > > Paul said: > > " I develop (Tech Pan) to a higher contrast than the > > driver assumes for negatives. So, by telling the driver > > it's a "positive" (slide film, presumeably), even though > > I also set the driver to "grayscale," the > > driver gives me its full dynamic range capabilities. > > I then adjust the histogram manually. It works well." > > Paul, sorry, but I am not sure what you mean by "developing". > Do you mean *darkroom* development, ... Yes, I develop Technical Pan film myself. That film's native characteristics are to be very high contrast. As such, holding down the contrast has always been difficult and often results in blotchy, un-even development. Allowing it to go to a higher contrast -- which works well for scanners designed for slide film -- allows medium format Tech Pan negatives to be essentially free from the problems we had with the film when we were printing with an enlarger. >... C41 B&W, ... option ... Many love these films. I used them in medium format for my hand-help B&W shooting. I had a Fuji Zi with zoom and AF that really made a fine combo for fast action people shooting. I switched that type of shooting to digital now. For my landscape work I found that the C-41 films in 6x6 or 645 were barely able to make what I'd consider a super-sharp, reasonably fine grain 16 x 20" enlargement. Also, unlike silver films, as my filtered skies get darker, the grain increased. These films are smoothest where there are lots of overlapping dye clouds. They look just like the 400 ISO films they are in the shadows. Paul www.PaulRoark.com
2008-08-22 by djon43
While I would > > like to think it would be dust free I know that is effectively > > impossible. > > ~Mary > > > I gave up on silver film, partly > because of the dust problem. > > Harry > It doesn't take much skill to eliminate "dust problems." Use of a lab will inevitably result in scratches, no matter what you're experiencing at the moment. 1) use distilled water, not filtered, for the last change or two of water (agitating...you do of course use a stainless reel because you can't properly clean plastic). You can use relatively clean tap water to mix chems and to do the initial rinses. 2) use distilled water, not filtered, with 3 drops Photoflo per 500cc for a few second dip before hanging. 3) hang to dry in a low dust area...in my case, that's a casually cleaned bathroom, hanging from clips on coat hangers hung in turn on the shower curtain rod. Any small amount of dust that remains can be cloned out in moments...in extreme cases (carelessness) it can be eliminated with the lightest Photoshop dust/spot setting (which will conserve some film character that XP2 and color neg films totally lack to begin with). IMO if you resort to XP2/color neg you might as well go digital because your detail resolution and tonal scale will be better...assuming more than 10mp on APS-C and assuming you don't use inexpensive zooms. An important trick is to avoid polyethlene negative sleeves.
2008-08-22 by Mark Savoia
Not ALL labs :) Mark http://www.ctphoto.com On Aug 22, 2008, at 11:25 AM, djon43 wrote: > Use of a lab will inevitably result in scratches, no matter what > you're experiencing at the moment. [Non-text portions of this message have been removed]
2008-08-22 by djon43
Mark, Your site's convincing. Some opinions: A good quality lab uses dip & dunk, as you do, unless they are small enough (one person lab) to rely on SS reels. Rotary and continuous equal bad quality IMO. Your 35mm silver process / scan prices are what anybody should expect if they want quality results...lower price means the lab will die. I'd use you except that a) I'm now mostly digital and b) I like the character of Rodinal (for Hexar AF). As well, I dislike your Senator intensely :-) John/Albuquerque --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Mark Savoia <mark@...> wrote:
> > Not ALL labs :) > > Mark > http://www.ctphoto.com > > On Aug 22, 2008, at 11:25 AM, djon43 wrote: > > > Use of a lab will inevitably result in scratches, no matter what > > you're experiencing at the moment. > > > > [Non-text portions of this message have been removed] >
2008-08-23 by Harry Lockwood
--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "djon43" <djon43@...> wrote: > > While I would > > > like to think it would be dust free I know that is effectively > > > impossible. > > > ~Mary > > > > > > I gave up on silver film, partly > > because of the dust problem. > > > > Harry > > > > It doesn't take much skill to eliminate "dust problems." > Use of a lab will inevitably result in scratches, no matter what > you're experiencing at the moment. > > 1) use distilled water, not filtered, for the last change or two of > water (agitating...you do of course use a stainless reel because you > can't properly clean plastic). You can use relatively clean tap water > to mix chems and to do the initial rinses. > > 2) use distilled water, not filtered, with 3 drops Photoflo per 500cc > for a few second dip before hanging. > > 3) hang to dry in a low dust area...in my case, that's a casually > cleaned bathroom, hanging from clips on coat hangers hung in turn on > the shower curtain rod. > > Any small amount of dust that remains can be cloned out in > moments...in extreme cases (carelessness) it can be eliminated with > the lightest Photoshop dust/spot setting (which will conserve some > film character that XP2 and color neg films totally lack to begin > with). IMO if you resort to XP2/color neg you might as well go digital > because your detail resolution and tonal scale will be > better...assuming more than 10mp on APS-C and assuming you don't use > inexpensive zooms. > > An important trick is to avoid polyethlene negative sleeves. Then I guess I lack the "skill to eliminate 'dust problems.'" No Lab involved; I develop my own Ag-based films. No scratch problems whatsoever. SS tank? Check. Photoflo rinse? Check. Hang to dry in closed shower stall? Check. Distilled water rinse? Uh oh. Haven't tried that. Since I have a roll of TMax in the tank, I'll give it a try. Another problem I couldn't solve was film curl. Created scanning problems in my Nikon 4000 ED. The C41 film I get from the local (pro) shop is dead flat. I use PrintFile neg holders, and, indeed, they are polyethlene. The manufacturer claims they are archival and better for not attracting dust. What would you recommend as a alternative? Might as well go digital? Bite your tongue! (As I fondle my M7.) As for tonal scale, my feeling is that the printing workflow may have a greater impact on *my* images. I use K7 piezo inks on (typically) HPR in an Epson 2400. And since I don't do landscapes, perhaps I'm just not seeing the loss of tonal range. (Also, I had originally mentioned the exposure latitude of XP2 which I find valuable in fast shooting situations and tricky lighting.) Nonetheless, I do appreciate the comments/suggestions. I realize there are some heavy hitters (ncluding djon43) here with vastly more experience than I have. Harry
2008-08-25 by E Neilsen
WOW, lots said but not a lot of info. Said tongue in cheek, but so much not mentioned that really effects the question. While some may think they have "the" process for making perfect negs, in either color or B&W, I have found great stuff can come from many places. It really comes down to matching your environment to make a good clean neg. Color or B&W neg? I haven't push the envelope on it yet, but Kodak did introduce some C41 films meant for scanning. They looked good to me, but I only have tried it under studio lights and I don't think that is a fair comparison to many of my other negs. If you put the priority on little post scanning a good color neg may be your best bet if you like the ICE control. If your intent is B&W, your not really concerned about color crossover tat might be a problem with way over or underexposed C41. Grain and sharpness can be a complicated issue when you are talking scans and prints. What type of scanner do you plan to use? What is your post production plan? In handling digital files to print, the whole process needs to be taken into account; at least from where I sit. I find that Vue Scan allows me to get better B&W scans than Nikon Scan ( I use a 9000). I didn't however, try to beat the beast by going positive with my negatives. How many tests are you willing to run? You can scan in RGB and look at the channels for noise, sharpness, etc. and decide what you have handles each best. XP2 looked sharper than mushy TCN. I rather like Delta 100 or 400 negs that I have scanned. Tech Pan is also a dead film is it not? So unless you have access to it, our process may not help you. I liked HC110 at 1:25 for contone images with it. What if any color stain is in your negs? Heavy hitters don't always use a bat the same way you might either. Get to know your tools and hit it out of the park in a way that makes you most happy and damn what the rest of us say Harry. Eric Eric Neilsen Photo 4101 Commerce Street, Suite 9 Dallas, TX 75226 214 827-8301 http://ericneilsenphotography.com SKype ejprinter _____
From: DigitalBlackandWhiteThePrint@yahoogroups.com [mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of Harry Lockwood Sent: Saturday, August 23, 2008 9:38 AM To: DigitalBlackandWhiteThePrint@yahoogroups.com Subject: [Digital BW] Re: Scan color or B/W better for B/W printing? --- In DigitalBlackandWhit <mailto:DigitalBlackandWhiteThePrint%40yahoogroups.com> eThePrint@yahoogroups.com, "djon43" <djon43@...> wrote: > > While I would > > > like to think it would be dust free I know that is effectively > > > impossible. > > > ~Mary > > > > > > I gave up on silver film, partly > > because of the dust problem. > > > > Harry > > > > It doesn't take much skill to eliminate "dust problems." > Use of a lab will inevitably result in scratches, no matter what > you're experiencing at the moment. > > 1) use distilled water, not filtered, for the last change or two of > water (agitating...you do of course use a stainless reel because you > can't properly clean plastic). You can use relatively clean tap water > to mix chems and to do the initial rinses. > > 2) use distilled water, not filtered, with 3 drops Photoflo per 500cc > for a few second dip before hanging. > > 3) hang to dry in a low dust area...in my case, that's a casually > cleaned bathroom, hanging from clips on coat hangers hung in turn on > the shower curtain rod. > > Any small amount of dust that remains can be cloned out in > moments...in extreme cases (carelessness) it can be eliminated with > the lightest Photoshop dust/spot setting (which will conserve some > film character that XP2 and color neg films totally lack to begin > with). IMO if you resort to XP2/color neg you might as well go digital > because your detail resolution and tonal scale will be > better...assuming more than 10mp on APS-C and assuming you don't use > inexpensive zooms. > > An important trick is to avoid polyethlene negative sleeves. Then I guess I lack the "skill to eliminate 'dust problems.'" No Lab involved; I develop my own Ag-based films. No scratch problems whatsoever. SS tank? Check. Photoflo rinse? Check. Hang to dry in closed shower stall? Check. Distilled water rinse? Uh oh. Haven't tried that. Since I have a roll of TMax in the tank, I'll give it a try. Another problem I couldn't solve was film curl. Created scanning problems in my Nikon 4000 ED. The C41 film I get from the local (pro) shop is dead flat. I use PrintFile neg holders, and, indeed, they are polyethlene. The manufacturer claims they are archival and better for not attracting dust. What would you recommend as a alternative? Might as well go digital? Bite your tongue! (As I fondle my M7.) As for tonal scale, my feeling is that the printing workflow may have a greater impact on *my* images. I use K7 piezo inks on (typically) HPR in an Epson 2400. And since I don't do landscapes, perhaps I'm just not seeing the loss of tonal range. (Also, I had originally mentioned the exposure latitude of XP2 which I find valuable in fast shooting situations and tricky lighting.) Nonetheless, I do appreciate the comments/suggestions. I realize there are some heavy hitters (ncluding djon43) here with vastly more experience than I have. Harry [Non-text portions of this message have been removed]
2008-08-25 by E Neilsen
Well, There was some real info, sorry, missed this set of reply as they are RE: and the other set was [Digital B&W].. I still go by, know your tools and use them to craft your image. Ones persons grain is another persons sharpness ; ) Eric Neilsen Photo 4101 Commerce Street, Suite 9 Dallas, TX 75226 214 827-8301 http://ericneilsenphotography.com SKype ejprinter _____
From: DigitalBlackandWhiteThePrint@yahoogroups.com [mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of fredfischer77 Sent: Wednesday, August 20, 2008 3:02 PM To: DigitalBlackandWhiteThePrint@yahoogroups.com Subject: Re: [Digital BW] Scan color or B/W better for B/W printing? --- In DigitalBlackandWhit <mailto:DigitalBlackandWhiteThePrint%40yahoogroups.com> eThePrint@yahoogroups.com, Bruce Watson <bwyg@...> wrote: > > fredfischer77 wrote: > > --- In DigitalBlackandWhit <mailto:DigitalBlackandWhiteThePrint%40yahoogroups.com> eThePrint@yahoogroups.com, Bruce Watson <bwyg@> wrote: > > Hi Bruce > > > > I believe grainier highlights are a product of development. Highlight areas tend to exhaust or have slower development activity, because of the large amount of exposure they receive, creating a larger "grain" where as shadow areas develop more fully. This really holds true > > with "silver solvent" developers like D76. > > > > Interesting theory which holds some truth if you are talking about stand > or semi-stand development where the point is to induce developer > exhaustion in the highlights. For normal agitation however development > doesn't exhaust anywhere on the film. That is actually the point of > normal agitation -- to prevent developer exhaustion. > > Grain clumps vary widely in size depending on exposure and subsequent > development. One of the reasons for this is the 3D nature of the > emulsion. More exposure means that photons transit deeper into the > emulsion. When developed to metallic silver, the individual grains > overlap forming a larger overall grain clump. If you want to see some > photomicrograms, have a look here: > > http://aic.stanford <http://aic.stanford.edu/sg/emg/library/pdf/vitale/2006-03-vitale-> .edu/sg/emg/library/pdf/vitale/2006-03-vitale- filmgrain_resolution.pdf > > Mr. Vitale has been researching this and other film topics for decades. > There's way more information here than most people want to know. But it > all makes sense, and other researchers like Kodak's Grant Haist back him > up. > > I specifically refer you to page 17, figure 18-D which shows an > excellent example of grain clumping. > -- > Bruce Watson > Continuous processing (Jobo, Wing-Lynch, roller transport) has somewhat the same "grainer highlight" effect as the soluble halides, which are released in development, act as restrainers, again slowing highlight development, and also the shorter development times of that type of process. Hand process, dip and dunk all have a "stand" time just for restraining reasons. Different B&W films have different amounts of iodides/bromides (restrainers) built into them as a control. I have noticed that film developed in Rodinal seems to have fairly uniformed grain size regardless of exposure. Again this is a different developer (p-Aminophenol) that makes a very sharp, high acutance image. The high dilution (1:25, 1:50) exhaust quickly in highlight areas during the recommended stand times acting as restraint. I will refer you to "Photographic Materials and Processes" page 273 (7.40) which has 4 authors, and, although I could give a educated guess to who wrote what, the book is strong enough to stand on its own. F Fischer [Non-text portions of this message have been removed]
2008-08-25 by djon43
I'm CERTAINLY not a "heavy hitter." However, I've printed forever in darkrooms and struggled intensively with scanning/inkjet. I have found that no amount of filtration works as well as distilled (not filtered) water (which I buy at pharmacies or grocery stores). It's cheap. You have a Nikon 4000 so you know high resolution..I find that my Nikon V exaggerates dirt which does escape fine filtration. In my experience, it only takes a final rinse or two plus photoflo/distilled dip to do the trick. For me, bottled distilled water is actually more convenient than filtration. The alternative to polyethylene is polyester, a hard, somewhat rigid plastic. I prefer the "sidelock" polyester sleeves from Light Impressions Direct because the film doesn't have to be dragged across so much sleeve to be inserted and removed. I'm sure you're right that polyethylene is "archival" but that's not the only issue IMO. I notice that my 30 year old Savage and Agfa glassines (translucent paper) are still in good shape (though yellowing), the negs still scan beautifully, with minimal spotting. Sorry I said "skill." It's an issue of "technique." --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Harry Lockwood" <hflockwood@...> wrote: > > --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "djon43" <djon43@> wrote: > > > > While I would > > > > like to think it would be dust free I know that is effectively > > > > impossible. > > > > ~Mary > > > > > > > > > I gave up on silver film, partly > > > because of the dust problem. > > > > > > Harry > > > > > > > It doesn't take much skill to eliminate "dust problems." > > Use of a lab will inevitably result in scratches, no matter what > > you're experiencing at the moment. > > > > 1) use distilled water, not filtered, for the last change or two of > > water (agitating...you do of course use a stainless reel because you > > can't properly clean plastic). You can use relatively clean tap water > > to mix chems and to do the initial rinses. > > > > 2) use distilled water, not filtered, with 3 drops Photoflo per 500cc > > for a few second dip before hanging. > > > > 3) hang to dry in a low dust area...in my case, that's a casually > > cleaned bathroom, hanging from clips on coat hangers hung in turn on > > the shower curtain rod. > > > > Any small amount of dust that remains can be cloned out in > > moments...in extreme cases (carelessness) it can be eliminated with > > the lightest Photoshop dust/spot setting (which will conserve some > > film character that XP2 and color neg films totally lack to begin > > with). IMO if you resort to XP2/color neg you might as well go digital > > because your detail resolution and tonal scale will be > > better...assuming more than 10mp on APS-C and assuming you don't use > > inexpensive zooms. > > > > An important trick is to avoid polyethlene negative sleeves. > > Then I guess I lack the "skill to eliminate 'dust problems.'" > > No Lab involved; I develop my own Ag-based films. No scratch problems whatsoever. SS > tank? Check. > > Photoflo rinse? Check. > > Hang to dry in closed shower stall? Check. > > Distilled water rinse? Uh oh. Haven't tried that. Since I have a roll of TMax in the tank, I'll > give it a try. > > Another problem I couldn't solve was film curl. Created scanning problems in my Nikon > 4000 ED. The C41 film I get from the local (pro) shop is dead flat. > > I use PrintFile neg holders, and, indeed, they are polyethlene. The manufacturer claims > they are archival and better for not attracting dust. What would you recommend as a > alternative? > > Might as well go digital? Bite your tongue! (As I fondle my M7.) > > As for tonal scale, my feeling is that the printing workflow may have a greater impact on > *my* images. I use K7 piezo inks on (typically) HPR in an Epson 2400. And since I don't > do landscapes, perhaps I'm just not seeing the loss of tonal range. > > (Also, I had originally mentioned the exposure latitude of XP2 which I find valuable in fast > shooting situations and tricky lighting.) > > Nonetheless, I do appreciate the comments/suggestions. I realize there are some heavy
> hitters (ncluding djon43) here with vastly more experience than I have. > > Harry >
2008-09-07 by garethjolly
One other tip on the shower stall. Remove the towels first (they're dust magnets) and run the shower with hot water for a few minutes to create some steam (settles the dust). Then put the film in to dry I shoot B&W and scan - dust is not a great problem if I do the above and, in any event, it is pretty quick to remove in photoshop I also like Tri-X grain Cheers Gareth
2008-09-07 by c1asia
such a tough question to answer because there are so many, many variables involved. no short answers here but one can easily make a case for each being better than the other based on final image quality criteria as well as other pros and cons of each method. highly dependent on equipment, tools, techniques, workflow, $$$, etc. one gripe i have about digital is the quality of the blacks. just not the same as film, IMHO. i shoot 12-bit RAW and convert to 16-bit prophoto RGB (maybe i should use a narrower color gamut with a better tone curve?) but can never achieve the kind of Dmax you see in an analog process. it's a tradeoff between high Dmax and posterization with digital. maybe it's occurring on the printing side. i have yet to do a full test to see where best to focus on. so it's more than one question or even two questions as someone suggested. there are three different and distinct processes here that require very different skillsets - camera, scanner, printer/paper/inks/software. one can even make the case there are four - editing in photoshop. you need to align planets to maximize quality but that may not be feasible for many reasons. consider this though... if done right (i.e., using right film, development, etc.), some scanners offer true 16-bit scanning. this has a lot of advantages for the critical shadow areas as it has sixteen times the amount of tonal transitions as does 12-bit digital (new cameras today have 14- bits so 16-bit scanning only offers four times as many tonal transitions there). if you do the math for a 4000 dpi scanner, you get a lot more megapixels than even the full frame DSLRs. if you do a wet scan, you can increase the resolution of the image (albeit at the cost of more noticeable grain & dust so film/developer choice is a critical part of the quality equation). good scanning software is necessary and some offer multipass scanning to increase the dynamic range even more than what's on the original negative. you can even create different scan versions based on exposure and then use specialized software to process the image for additional increased resolution. but all this is a whole lotta work when digital is so much easier and cheaper. the question comes down to - what are you willing to trade off for quality? best to experiment before making the investmnet. try out some film (both color & b+w) and process and scan it at a lab like http://www.dr5.com. then print trying out both digital and analog in continuous tone and inkjet at a lab like http://www.dalmationlab.com. then you can make a good informed decision based on your objectives and parameters. also, to address your comment... you can scan in RGB rather than grayscale to use ICE and convert it to b+w in photoshop. try out the new silver efex pro plug-in for 15 days to see if that's something that fits with your needs. good for toned prints on color papers. hope this helps. good luck and please give us a followup report on what you decided on that works for you. --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "m_misiaszek" <m_misiaszek@...> wrote: > > I shoot 35mm film and want to print in B/W. Typically, what would give > the better B/W print in the end, shooting in color or in B/W? I > understand that Digital ICE does not work when scanning in B/W so it > would take some more time correcting dust in software. While I would
> like to think it would be dust free I know that is effectively > impossible. > ~Mary >
2008-09-07 by E Neilsen
Using a facility that you haven't used before does not always provide a good test. Using any lab, big or small requires a line of communication so that you both know what you are expecting and or giving. You can not use an RGB setting and ICE with B&W films across the board with equal or even any satisfaction. T400 CN or it replacement, XP2 will work better than a Tech Pan, Delta, etc. If you are seeing posterization in your B&W prints from scans, somebody is doing something wrong. It can come from many steps, but if you see it only through your output, you need to look at output profiles. Why shoot film instead of digital? Well one very big reason is that you can make a print in your darkroom and in your ink jet. If you are skilled in the darkroom, perhaps one that is better than a Photoshop manipulated file and limited output devices. And there is no guaranty that a digital capture is dust free either. Testing, testing, testing and direct observation of others process will get you closer. Direct observation includes how others are printing in darkrooms, their film choices including how those are processed. Their choices in how to scan, what software workflow they observe and why. What output choices they have made including color sets, or dedicated B&W sets, paper or canvas, etc Several years back at Photo Expo members of this group got together and shared work on ONE chosen file, perhaps it would be good to bring samples of various workflows so that curious minds could hold several samples at once. Eric Eric Neilsen Photo 4101 Commerce Street, Suite 9 Dallas, TX 75226 214 827-8301 http://ericneilsenphotography.com SKype ejprinter _____
From: DigitalBlackandWhiteThePrint@yahoogroups.com [mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of c1asia Sent: Sunday, September 07, 2008 1:42 PM To: DigitalBlackandWhiteThePrint@yahoogroups.com Subject: [Digital BW] Re: Scan color or B/W better for B/W printing? such a tough question to answer because there are so many, many variables involved. no short answers here but one can easily make a case for each being better than the other based on final image quality criteria as well as other pros and cons of each method. highly dependent on equipment, tools, techniques, workflow, $$$, etc. one gripe i have about digital is the quality of the blacks. just not the same as film, IMHO. i shoot 12-bit RAW and convert to 16-bit prophoto RGB (maybe i should use a narrower color gamut with a better tone curve?) but can never achieve the kind of Dmax you see in an analog process. it's a tradeoff between high Dmax and posterization with digital. maybe it's occurring on the printing side. i have yet to do a full test to see where best to focus on. so it's more than one question or even two questions as someone suggested. there are three different and distinct processes here that require very different skillsets - camera, scanner, printer/paper/inks/software. one can even make the case there are four - editing in photoshop. you need to align planets to maximize quality but that may not be feasible for many reasons. consider this though... if done right (i.e., using right film, development, etc.), some scanners offer true 16-bit scanning. this has a lot of advantages for the critical shadow areas as it has sixteen times the amount of tonal transitions as does 12-bit digital (new cameras today have 14- bits so 16-bit scanning only offers four times as many tonal transitions there). if you do the math for a 4000 dpi scanner, you get a lot more megapixels than even the full frame DSLRs. if you do a wet scan, you can increase the resolution of the image (albeit at the cost of more noticeable grain & dust so film/developer choice is a critical part of the quality equation). good scanning software is necessary and some offer multipass scanning to increase the dynamic range even more than what's on the original negative. you can even create different scan versions based on exposure and then use specialized software to process the image for additional increased resolution. but all this is a whole lotta work when digital is so much easier and cheaper. the question comes down to - what are you willing to trade off for quality? best to experiment before making the investmnet. try out some film (both color & b+w) and process and scan it at a lab like http://www.dr5. <http://www.dr5.com.> com. then print trying out both digital and analog in continuous tone and inkjet at a lab like http://www.dalmatio <http://www.dalmationlab.com.> nlab.com. then you can make a good informed decision based on your objectives and parameters. also, to address your comment... you can scan in RGB rather than grayscale to use ICE and convert it to b+w in photoshop. try out the new silver efex pro plug-in for 15 days to see if that's something that fits with your needs. good for toned prints on color papers. hope this helps. good luck and please give us a followup report on what you decided on that works for you. --- In DigitalBlackandWhit <mailto:DigitalBlackandWhiteThePrint%40yahoogroups.com> eThePrint@yahoogroups.com, "m_misiaszek" <m_misiaszek@...> wrote: > > I shoot 35mm film and want to print in B/W. Typically, what would give > the better B/W print in the end, shooting in color or in B/W? I > understand that Digital ICE does not work when scanning in B/W so it > would take some more time correcting dust in software. While I would > like to think it would be dust free I know that is effectively > impossible. > ~Mary > [Non-text portions of this message have been removed]