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Digital BW, The Print

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Re: My first QTR paper curve---HELP!!

2005-04-24 by Johnny Eades

Thanks Shilesh,

I had partly thought this would be the procedure but the more that I 
thought the more confused I got. I gues that is part of the reason 
for this newsgroup. Group help...

Thanks again,

Your friend in Photography,

Johnny

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Shilesh Jani" 
<shilesh.jani@s...> wrote:
> 
> Johnny,
> 
> It took me a while to figure out the madness.  Using your C=1.13 as 
> an example:  Go to the 21 steps of the black ink, and find which 
step 
> gives you d=1.13.  You may not find an exact match; you may find 
that 
> on the black ink steps X%=1.00 and X+5% is 1.2.  That means the 
true 
> value is somewhete in between.  Using the above as an example, it 
is 
> closer to x+5%, so I would type in X+4% as a SWAG.  It does not 
have 
> to be absolutely accurate.  You will be linearizing the whole mess 
> later on anyway.  This step just determines the amount and location 
> of overlap of adjacent density inks.
> 
> Hope this helps.
> 
> Shilesh
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Johnny Eades" 
> <jeades1@s...> wrote:
> > 
> > I finally got a densitometer and am in the process of creating my 
> > first paper curve for Epson Heavyweight Matte paper(Neutral 
curve) 
> > and MIS UT2 inks and an Epson 1280 printer. 
> > 
> > I have charecterized the inks and found the black maxed out at 
60% 
> > ink when printed at 100% ink in the first pass. I am now at the 
> stage 
> > of just after printing the second calibration chart at that 60% 
and 
> > have read the ink densities of each ink position. The results are:
> > 
> > K=1.56
> > C=1.13
> > M=1.09
> > Y=not used
> > LC=.96
> > LM=.97
> > 
> > From the help file "This process is repeated for each lighter 
ink, 
> > comparing it to the next darker ink, calculating its density 
> relative 
> > to that ink and then converting it to a density relative to the 
> > darkest ink. Record these values in the appropriate ink density 
> box." 
> > 
> > This is where my logic fails me. In the curve creator how do I 
> > determine what density percentages to enter? I know there are 
many 
> > who have created these curves, so could someone fill in the 
missing 
> > information for me after telling me the method of determining the 
> > density percentages? I would really appreciate all help from 
> soneone 
> > who has surmounted this step. 
> > 
> > Your friend in Photography,
> > 
> > Johnny

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