U of S | Mailing List Archive | alt-photo-process-l | RE: Printing gum with little pigment

RE: Printing gum with little pigment

This is exactly was I found and was trying to illustrate and totally agrees with my observations. I was hoping more people would chime in with their illustrations on the subject.

> Date: Sat, 17 Jan 2009 17:25:15 -0800
> From: kthayer@pacifier.com
> Subject: Re: Printing gum with little pigment
> To: alt-photo-process-l@usask.ca
> On Jan 16, 2009, at 3:05 PM, Marek Matusz wrote:
> > Loris,
> > Here is where the argument breaks down. What you consider a weak/
> > moderate pigment I might be using and defining as strong. The only
> > way for you to convince yourself of the validity of your assumption
> > is to cut the pigment concentration in half or quarter and print
> > something side by side. I am looking for people that have done it
> > already and can share the actual prints/test strips.
> Okay, this is all I found in an afternoon of searching through boxes
> of test strips and test prints, that would serve the purpose. It
> would have taken me less time to just go down and print some, but I
> don't want to go down there; it's cold. . :--) Anyway, here is a
> comparison of two Stouffer 21-step prints in Prussian at two
> different pigment concentrations; it is consistent with your
> observations. These would have been exposed and developed in a way
> to yield the optimal DMax and maximum number of steps for each mix,
> per the instructions on my site.
> http://www.pacifier.com/~kthayer/html/pigcomp.html
> Hope that's useful,
> Katharine

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