[Alt-photo] Alt-photo-process-list Digest, Vol 127, Issue 5
nirpat89 at yahoo.com
Wed Sep 28 22:54:47 UTC 2016
I use ChartThrob where the main layout is for 101 squares of 1% variation. It also has a strip of 21 steps on the side of 5% each. I also put in a homemade 21-step wedge on the side of the each of my negatives (before applying the curve) for the photographs, so I can track of what is going on.
I do not use densitometer so I can't give you reflection density. Instead, I use a scanner (calibrated to a it8.7/2 target) to give me RGB values of the steps which I then desaturate for easy comparison. For the densest step, I am getting RGB values in the range of 29-31. The second at 95% step reads in the 38 area as the process stands today.
As far as how many steps are printing distinctly, visually - all 21 are.
From: Mark Nelson via Alt-photo-process-list <alt-photo-process-list at lists.altphotolist.org>
To: alt-photo-process-list at lists.altphotolist.org
Cc: Mark Nelson <ender100 at aol.com>
Sent: Wednesday, September 28, 2016 6:04 PM
Subject: Re: [Alt-photo] Alt-photo-process-list Digest, Vol 127, Issue 5
Which Steptablet are you using? 21, 31, 41?
How many distinct steps are printing?
What is the reflection density of the darkest step? The next to darkest step?
PDNPRint Forum @ Yahoo Groups
More information about the Alt-photo-process-list