Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "ccolbertbw"
<ccolbert@u...> wrote:
> 
> Johnny,
> All in all those numbers don't look that odd, except for perhaps the
> low dmax, but I don't know what it should be for that paper. On
> Photorag I would expect closer to 1.7.
> 
> The following sort of assumes you are using a Mac. On a PC there
> may be other ways to not get what you want.


No, I use a PC and Roy's QTR 2.2b for Windows.
 
> So, a couple of clarifications:
> 
> 1. Are you using the exact same file as your "supplied paper curve"
> with the exception of the LINEARIZE statement?

Yes 
> It sounds like you might be printing with the wrong black.
> 
I'm using MIS Eboni inks UT2 for the Epson 1280

> 2. Did you use the same settings for dpi etc?
Yes everything was the same but for the density reading replaced with
mine.

> Printing at a different dpi will change the curve.

DPI was the same for both 

> 3. Did you delete the LINEARIZE statement to print the test strip?
 
It was deleted with the new one after linearization  

> You don't want the old one in effect, since there is only one
linearization
> done, so that when you put new values in, you would lose the effect
> of the old one.
> 
> 4. Does the linearize statement look like: LINEARIZE="0.03 .10 .19
and so on
> all on one line?

Yes
> 
> 5. Are you getting any errors during the curve generation? They can
go by
> very quickly. Do the individual inks come in and go out in a
reasonable way?
> Sometimes you can get NAN and other indications of an error.
Usually, in 
> that case you can't use the curve, however.
> 

No error were noted or observed by me.

> Hope that's a start.
> 
> Costa
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Johnny Eades"
<jeades1@s...> 
> wrote:
> > 
> > Today I had access to a densitometer for about an hour at a nearby
> > print shop. The gentleman showed me how to read paper white and then
> > the rest of the 21 step grayscale. After the numbers were recorded I
> > brought the readings into QTR to linearize. Printing a previous 21
> > step grayscale with the supplied paper curve and comparing it to one
> > printed with my paper curve created from the readings, mine is
> > extremely dark and flat. I've changed the ink limit and the black
> > boost with no favorable results. I'm bidding on an X-Rite 810
> > densitometer on Ebay. The one I used today at the print shop was an
> > X-Rite 500. With the supplied paper curve, the 85-100 steps were
> > clearly separated; but with my readings, 85-100 was totally black and
> > shiny with ink lay down. The actual numbers for my readings were much
> > smaller than those with the supplied curves. My DMax was 1.52 and the
> > paper white was .03. I am using H'Muhle Photo Matte 170gsm paper with
> > UT2 inks.
> > 
> > Could someone make sense from the percentage readings?
> > 0--.03
> > 5--.10
> > 10--.19
> > 15--.26
> > 20--.34
> > 25--.44
> > 30--.52
> > 35--.60
> > 40--.70
> > 45--.80
> > 50--.89
> > 55--.97
> > 60--1.03
> > 65--1.09
> > 70--1.13
> > 75--1.18
> > 80--1.23
> > 85--1.29
> > 90--1.34
> > 95--1.38
> > 100--1.52
> > 
> > My ink limit for the test was 70% with Black Boost of 85%.
> > 
> > Any and all help will be greatly appreciated in helping me get this
> > resolved.
> > 
> > Your frustrated friend in Photography,
> > 
> > Johnny