Re: Using a densitometer to make digital negative curves
2017-02-19 by sanking@...
Richard, Would you explain the rationale for not zeroing to paper base the density readings? The targets for the iOne have a BEG and END zone that seems
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Re: [QuadtoneRIP] Help With Making QTR Curve
2017-02-19 by Roy Harrington
Ian, I m not sure what you are doing because I took your data from the post, put it in a txt file and ran it through QTR-Linearize-Data and it worked just
Re: [QuadtoneRIP] Help With Making QTR Curve
2017-02-19 by Myron Gochnauer
The L values need to be sorted before using it for linearization. I can t recall for certain, but I think the L values need to go from high to low. If that
Re: [QuadtoneRIP] Help With Making QTR Curve
2017-02-19 by Keith Schreiber
Hi Ian, As Alan and Paul have already noted, the L* values of your 21-step target MUST be in ascending order from white to black. Looking at the numbers you
Re: [QuadtoneRIP] Help With Making QTR Curve
2017-02-18 by Alan Vlach
I believe the L column has to go from highest values at the top to lowest values at the bottom Sent from my iPhone
Re: [QuadtoneRIP] Help With Making QTR Curve
2017-02-18 by Paul Roark
For prints I always read the 21-step test strip from the paper white end (0%) to the 100% black end, in order: 0, 5, 10 ... 95, 100. Even then, there has to
Re: Using a densitometer to make digital negative curves
2017-02-18 by petware@...
Thanks Richard, I ll give your method a try. That spreadsheet is very helpful
Re: Using a densitometer to make digital negative curves
2017-02-18 by richard@...
I use the actual density readings without zeroing out on paper white. You can get the majority of the correction done with the gray curve and then do a second
Re: Using a densitometer to make digital negative curves
2017-02-18 by petware@...
Richard, that s a very useful spreadsheet thanks! One question please, do you zero out your densitometer on paper white before taking the 100% ink reading or
Re: Using a densitometer to make digital negative curves
2017-02-18 by petware@...
Many thanks Sandy, I believe I have a better understanding now. Your help is greatly appreciated!
Re: Using a densitometer to make digital negative curves
2017-02-18 by sanking@...
Am I to assume that the linearize is added after an initial gray curve is added to the profile to fine tune the profile or do you use linearize instead of a
Re: Using a densitometer to make digital negative curves
2017-02-18 by sanking@...
Erik, I use both the 21 step wedge in the iOne folder that is included with QTR, and also the 51 step wedge. Also use the 51 step wedge in the iOne folder, but
Re: Using a densitometer to make digital negative curves
2017-02-18 by petware@...
Ok, Sandy now I get it. Thanks! I was assuming I needed input output values like the gray curve needs. Indeed it does seem simple compared to what I was
Re: Using a densitometer to make digital negative curves
2017-02-18 by richard@...
Use this: http://www.bwmastery.com/qtr-correction-curve-tool
Re: Using a densitometer to make digital negative curves
2017-02-18 by sanking@...
Erik, BTW, you should probably set the densitometer to read Visual, that way it will read all of the colors and average the density. Unless you are making
Re: Using a densitometer to make digital negative curves
2017-02-18 by sanking@...
Erik, It is very simple. You just set your densitometer to read density (not Dot Gain), and then set it to Density minus paper so that when you read the 0%
Re: Using a densitometer to make digital negative curves
2017-02-18 by petware@...
Thanks Sandy, I want to try the linearize and my densitometer has visual as well as rgb channels to choose from. One thing I m not fully grasping is how to
Re: Using a densitometer to make digital negative curves
2017-02-18 by sanking@...
Erik, Most QTR profiles allow you to create correction curves either with the GRAY_CURVE= command, or with LINEARIZE. The easiest way by far that I have found
Re: Using a densitometer to make digital negative curves
2017-02-17 by petware@...
I was planning to use just a print out of a 21 step 0-100% wedge, but I do have a stouffer 21 step wedge that I could use as well which I guess would give me
Re: Using a densitometer to make digital negative curves
2017-02-17 by peterjbh@...
I m switching from a scanner to an 810 myself but it doesn t get here until the 24th. Are you using the stouffer 31 step strip?
Re: [QuadtoneRIP] Using a densitometer to make digital negative curves
2017-02-17 by Simone Simoncini
I have an 810 too. You can read the values and put them in the GRAY_CURVE= parameter. I find it quite useless though. I use the build gray curve tool to adjust
Using a densitometer to make digital negative curves
2017-02-17 by petware@...
Hi folks, I was wondering if there are any tutorials on how to use a densitometer to create correction curves for digital negatives. I am Mac based and have an
Re: Using QTR With My Epson R3880
2017-02-16 by ian@...
Thanks Brian. I will have a good read tomorrow morning after this headache has subsided :) Ian
Re: Using QTR With My Epson R3880
2017-02-16 by brian_downunda@...
Larry B has published a workflow for using the Munki with QTR (Windows). It s aimed more at Piezography, but I imagine that the essentials would apply to any
Using QTR With My Epson R3880
2017-02-16 by ian@...
I am returning to QTR as a last resort to try and get to the bottom of my BW printing issue. I have always used the ABW driver but never really been that happy
Re: Banding On the Epson P800
2017-02-11 by efo@...
Sandy - and everyone else - this seems to be the winner. Thanks so much for suggesting it. I m finally found the thick paper setting on the front panel (via:
Re: [QuadtoneRIP] Looking for reliable carts
2017-02-11 by jeff.grant@...
Larry, No, I haven t but past experience says that OEM don t leak ever. I have done it in the past but getting rid of the colour is such a pain that I would
Re: [QuadtoneRIP] Looking for reliable carts
2017-02-11 by Larry Beach
Jeff, Have you tried OEM colour carts in your R2000 recently? Larry ... On Wed, 2/8/17, jeff.grant@pobox.com [QuadtoneRIP] wrote:
Re: [QuadtoneRIP] Re: Looking for reliable carts
2017-02-10 by jeff.grant@...
Thanks Larry.
Re: [QuadtoneRIP] Re: Looking for reliable carts
2017-02-10 by Larry Beach
Just so you know, I wouldn t recommend InkOwl s R2000 carts for piezography. I couldn t get complete nozzle checks with piezoflush, nor with piezography ink.
Re: Looking for reliable carts
2017-02-10 by jeff.grant@...
Thanks Don. I ve ordered a set from them. They must be a non-battery set judging by the price. I would be delighted if they worked.
Re: Looking for reliable carts
2017-02-10 by donsbryant@...
Hello Jeff, You may wish to try Precision Colors. I have read about positive experiences about their carts and non-oem inks from others.
Re: Looking for reliable carts
2017-02-09 by jeff.grant@...
Thanks Myron. I had a 3880 using refillable without any issues. It s the desktop, cart on head type printers that present issues. The reason that I abandoned
Re: [QuadtoneRIP] Looking for reliable carts
2017-02-09 by Larry Beach
Sorry Jeff, I m not meaning to pester! I m interested in the results because I use the same model that I got specifically for piezography. I ve left another
Re: Banding On the Epson P800
2017-02-09 by daimone@...
Does no one among the people who developed QTR have any idea what the issue might be? Since the printer prints lovely when not using QTR, and I assume the
Re: [QuadtoneRIP] Looking for reliable carts
2017-02-09 by Myron Gochnauer
Hmmmm. I ve watched this thread with growing interest. I have used a mix of OEM and refillable cartridges for Epson printers on and off for years: C88,
Re: [QuadtoneRIP] Looking for reliable carts
2017-02-09 by jeff.grant@...
Larry, I’ve been there and done that. The IJM carts have had your cleanup done on them. I bought the other carts a while back but hadn’t used them until
Re: [QuadtoneRIP] Looking for reliable carts
2017-02-09 by Larry
Jeff, So far I haven t had any trouble with IJM carts in my R2000. Are you able to take and post pictures of the exit ports of these carts? Larry ... Jeff,
Looking for reliable carts
2017-02-09 by jeff.grant@...
Perhaps, I have unrealistic expectations of my cartridges. When I set my R2000 up for use with Piezography inks, I bought IJM carts. These have proven to be
Re: [QuadtoneRIP] Re: Banding On the Epson P800
2017-02-08 by efo@...
Thanks, Roy. The image is actually a 600 dpi scan of a 2880 printout. Yes, it s very subtle but it s visible in the darkest area at the bottom. It does look
Looking for moderation help again
2017-02-07 by Tom Moore
Moderation is the lubricant that keeps this mail list running smoothly. We are once again, down to one moderator in addition to myself. The list runs quite
Partial print
2017-02-07 by post@...
Hi Roy. When printing from my Mac (El Capitain) I suddenly just get a small part (The lower right corner of the file printed in like A5-ish size) printed from
Re: [QuadtoneRIP] Re: Banding On the Epson P800
2017-02-07 by Roy Harrington
Efo, I looked at your image. It s subtle but I think I see what you are talking about. I m guessing its a 4inch scan at 600ppi, with source also at 600ppi.
Re: Banding On the Epson P800
2017-02-06 by efo@...
In case anyone is desperate to see what the negative produced on the p800 looks like, I just uploaded an image to the misc files area. It doesn t suggest
New file uploaded to QuadtoneRIP
2017-02-06 by QuadtoneRIP@yahoogroups.com
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the QuadtoneRIP group. File :
File Extension Issue
2017-02-06 by bwg@...
Hello! New QTR (Windows) user here - just purchased - and had a quick question (and had already typed up a message here), but just solved the problem myself
Re: Banding On the Epson P800
2017-02-05 by brian_downunda@...
This solution won t deal with the problem in the P800, because it has a different cause. The lead sheet approach only addresses micro-banding in the first and
Re: [QuadtoneRIP] Re: Banding On the Epson P800
2017-02-05 by daimone@...
The problem with this solution is that I m not having that issue in the first inch of the page, but through the entire page.
Re: [QuadtoneRIP] Re: Banding On the Epson P800
2017-02-05 by Felix Martin
I got my P800 about a year ago. I use it mainly for creating negatives using QTR for platinum printing. I have never had any problem except that the printer
Re: Banding On the Epson P800
2017-02-05 by David Aimone
So far I have done a bunch of tests with different printer and QTR settings and cannot eliminate banding on the P800. So, I have reverted back to creating