From: Dave Rose (cactuscowboy@attbi.com)
Date: 02/10/03-11:14:51 PM Z
Regarding your two points, I can't totally agree or disagree. There are too
many variables, the most important being the pigments themselves. Sorry to
be so brief. I'd be writing all night to do this subject justice.
Dave in Wyoming
----- Original Message -----
From: "pete" <temperaprint@blueyonder.co.uk>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Sunday, February 09, 2003 8:47 AM
Subject: Re: facts, feelings, wishes and swans...
> Chris,
> >
> > Yes, these are the two points I found interesting in the whole original
> > convo--that the orginial test was used with 100% dichro, and we were
taught
> > in my class that the amount of pigment produced the stain, so to lessen
the
> > pigment.
>
> In my opinion there are two staing processes at work here,
> one-:the stain produced by the pigment particles themselves for instance
> Phthalocyanine Blue can give massive stain whereas Cerulean blue does not.
>
> And two-: the concentration of the pigment in mixture the more pigment
mixed
> in a given volume increases contrast and reduces emulsion sensitivity to
> light, and also at the same time shows a corresponding reduction in the
> apparent pigment stain
>
> There is also the dichromate stain at work but that is another story
>
>
> Pete
>
>
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