Re: odd pigment question

I do not know about this particular pigment, but I thought it was a general
thing for yellow pigment. Since yellow is on the opposite end of violet, it
blocks violet and ultraviolet, so more exposure is needed in general.

Do you have the same "problem" that you described with other yellow as well?

Dave S

----- Original Message -----
From: "Christina Z. Anderson" <zphoto@bellsouth.net>
To: "Alt list" <alt-photo-process-l@sask.usask.ca>
Sent: Saturday, March 12, 2005 10:38 AM
Subject: odd pigment question

> Hi all,
> I have an odd observation: there is one pigment I have that for some
> reason seems to not expose well. It is M. Graham gamboge PY 151, PO 62.
>
> Most of my layers expose the same amount of time, 5 minutes. For some
> reason, that pigment sloughs off at that time. Anyone else experience
> this with this pigment or any other particular pigment they have used?
>
> It has happened a number of times. All my practice is the same. I
> measured the pH of the pigment thinking it might be more alkaline and then
> "slower", but it is the same pH. The only other thing I can think of is
> that for some reason I brushed on the pigment thicker with this than with
> others, but every time and just with this pigment? That seems odd.
> Chris
>
>
>
Received on Sat Mar 12 13:51:18 2005