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Digital BW, The Print

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Re: BW densities ?? The Rest of the MIS FS Story

2002-09-04 by shileshcjani

Alex,

First I presume you are using the Epson driver. And that you are 
using FS regular (Not FS-E) inks. If you are going to do any 
swapping, do the following:

Place cyan ink (dark) in cyan position
Place photocyan (dark-same ink as cyan) ink in the magenta position
Place the magenta ink (medium)in the photocyan position
Place the photomagenta ink (medium-same as magenta) in the 
photomagenta position.
Yellow goes in yellow position.

So now you have CcMmY = dark, medium, dark, medium, light

Now after nozzel checks, etc., print a gradient and 21 step 
from "grayscale" space. You will be amazed at the quality. A few 
minor tweak in a curves adjstument layer, and you are good to go for 
starters. This works extremely well with the 1280 printer, and unless 
there is something funky about the 2000P, it should be agood place to 
start.

Good luck.

Shilesh



--- In DigitalBlackandWhiteThePrint@y..., "a_pettit_jr" 
<a_pettit_jr@y...> wrote:
> Hello Jeff,
> The first set of values was obtained from creating an image with CMY
> saturated color blocks, doing a Luminance extraction, and then
> measuring their histogram grey levels...  C = 30 %  M = 59 % 
> Y = 12 %
> 
> I just printed the 21-step grey scale by converting to RGB space and
> then to the Epson 2000P. The grey range from 65% to 95% is quite
> magenta biased and the 35% to 65% has the cyan cast. The Epson 
driver
> thus seems to expect that the Magenta position will create a darker
> BW shading.
> 
> I again measured the MIS FS inks and the differing results show the
> variability in my eyeball comparisions ..
> B 100%
> C 30%
> M 8%
> Y 4.4%
> PCe 10%
> PMe 2.5%
> 
> I intend to install the inkset with the Cyan and PCyan swapped with 
the
> Magenta and PMagenta. There is too much inconsistency between what I
> measure and what the Epson Driver does vs the labels on the MIS FS
> bottles to Not do so....
> 
> Comments ???
> 
> Regards,
> Alex
> 
> <><><><><><><><><><><><><><><><><><><><><><><
> 
> 
> 
> --- In DigitalBlackandWhiteThePrint@y..., "jrandall1149"
> <jrandall@c...> wrote:
> > Alex:  
> > 
> > For both the hex-FS and hex-FS-E inksets the Cyan position ink is 
> > dark gray, the Magenta position ink is middle gray and the Yellow 
> > position ink is light gray. This is not consistant with your 
first 
> > test. 
> > 
> > In the hex-FS, the PM position ink is the same as the M position
> ink 
> > and the PC position ink is the same as the C position ink.
> > 
> > In the hex-FS-E, the PM position ink is a dilution of the M
> position 
> > ink and is therefore lighter and the PC position ink is a dilution
> of 
> > the C position ink and is therefore lighter.  Your second test of
> the 
> > hex-FS-E inks are consistant with this.
> > 
> > Try a swab test using a q-tip and visually compare.
> > 
> > Jeff Randall
> >

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