Digital BW, The Print

Carl,

 

(I’m just getting to the forum messages for the last 3 days.)  

 

As I mentioned off list, I was afraid the driver would under-use the LK and
LLK “core” inks in RGB mode.  This ink usage pattern seems to be consistent
with that, but it’s actually not as bad as I feared it’d be.  One thing that
might help marginally is to use UT7-LC instead of LLK in the yellow spot.
It’s a bit darker, but not much.  The higher load of carbon might cause the
ink amount of the ink to be lessened a bit.  In my first experiments I used
the UT7-LC and it worked very well.  It’s light enough that no dots appear.
As a practical matter, since the inks are all the same price for a bottle,
the higher the load, the cheaper the ink on a per-print basis.

 

What PK are you using?

 

Paul

www.PaulRoark.com <http://www.paulroark.com/>  

 

 

 

 

  _____  

From: DigitalBlackandWhiteThePrint@yahoogroups.com
[mailto:DigitalBlackandWhiteThePrint@yahoogroups.com] On Behalf Of Carl
Schofield
Sent: Sunday, August 20, 2006 1:38 PM
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: [Digital BW] Re: More lightfast 2400 prints -- carbon in the
Y-position

 

The extra LLK in the Y slot also works very well using the Epson driver with
a custom RGB 
profile (http://groups.
<http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint/message/79164>
yahoo.com/group/DigitalBlackandWhiteThePrint/message/79164) 
for toned or neutral monochrome images. Hue control with the custom RGB
profiles is 
also easier than guessing what you will get with the ABW driver if you use
the RGB profiles 
for softproofing when toning the images. 
Interesting to note how much "yellow" ink the Epson driver uses in this mode
compared to 
other inks. Grab shot in link below is Epson status monitor. All inks except
C and M were 
refilled at same time. Note greater "Yellow" (actually LLK) ink usage
compare to other ink 
positions (ignoring C and M). This was after printing about a dozen 11x14
toned and 
neutral RGB images.
http://homepage. <http://homepage.mac.com/scho/c1.jpg> mac.com/scho/c1.jpg
There is also a significant reduction in bronzing and GD on the hybrid gloss
papers I've 
tested so far when using LLK in the Y slot.

--- In DigitalBlackandWhit
<mailto:DigitalBlackandWhiteThePrint%40yahoogroups.com>
eThePrint@yahoogroups.com, "Paul Roark" <paul.roark@...> 
wrote:
>
> Although my 7500 is back and running now, while its future was
questionable,
> I was exploring whether to simply buy a 4800 or 7800. With respect to that
> issue, I was using a 2400 to see what combination of inks might be the
best
> way to go for B&W. Some of my results may be of interest to those with
> these printers.
> 
> 
> 
> The bottom line is that "Advanced B&W" mode printing works very well with
> carbon ink in the yellow position. A second LLK (or MIS UT7 LC) works very
> well, resulting in a very good ramp ("darker" and "Shadows - 10). What
this
> second LLK does is not only remove the relatively weak yellow pigment from
> the B&W mix, but it also results in prints that use the very minimum of
the
> LM and LC color pigments. Because the carbon is, in effect, a very low
> gamut yellow, the amounts of the LM and LC used to get to neutral are much
> less than if the high gamut yellow was in the printer. In a 2400, to get
> back to color printing, just stick the standard yellow cart back in.
> 
> 
> 
> The Epson K3 LK and LLK are not the same as the older K2 LK. The new LK
and
> LLK are much more neutral (and a bit green). The MIS ("K4") LK and LLK are
> still the more yellow color, very similar to the Epson K2 LK tone. Because
> the MIS K4 carbon inks are more yellow, the range that can be achieved
with
> them in the printer is greater on the warm end of the range than when the
> Epson LK and LLK are used.
> 
> 
> 
> Of course, when the MIS LK and LLK are used more color is needed to
achieve
> a neutral print. However, in past tests the MIS inks have still been more
> lightfast. I'll try to test this in the future. Note that while I'm told
> MIS LK and LLK are pure carbon, the Epson LK and LLK appear to be about
half
> carbon and half "proprietary dyes and pigments." (See for example the
MSDSs
> at
> http://www.epson.
<http://www.epson.com/cgi-bin/Store/support/supDetail.jsp?BV_UseBVCookie=yes
> com/cgi-bin/Store/support/supDetail.jsp?BV_UseBVCookie=yes
> <http://www.epson.
<http://www.epson.com/cgi-bin/Store/support/supDetail.jsp?BV_UseBVCookie=yes
> com/cgi-bin/Store/support/supDetail.jsp?BV_UseBVCookie=yes
> &oid=57105&infoType=MSDS> &oid=57105&infoType=MSDS ; I do not have
> comparable MIS sheets.)
> 
> 
> 
> At any rate, for those who want more lightfast prints from their 2400 with
> the minimum of work, just pulling the yellow and sticking a second LLK in
> that position (with the Y chip put on that cart) appears to be a serious
> contender. Using all the inks with the Epson driver in ABW mode at RPM
> resolution produced Crane Silver Rag prints that were as good as any I've
> ever seen.
> 
> 
> 
> Paul
> 
> www.PaulRoark.com <http://www.paulroar <http://www.paulroark.com/> k.com/>


 



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