From: Christina Z. Anderson (zphoto@montana.net)
Date: 05/09/03-11:05:44 AM Z
Thanks for that, Bill. I thought it did too, and then I was unsure because
this one book talked about its adding steps on a step tablet, and I thought
it meant it would add more tonal range and thus decrease contrast, so I must
be thinking screwy.
Chris
----- Original Message -----
From: "Bill Collins" <photo@intrex.net>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Wednesday, April 09, 2003 10:49 AM
Subject: Re: hp and pot di with pt/pd
> I thought hydrogen peroxide also increased contrast. I'd like to see a
negative that required a contrast decrease for pt/pd.
>
> Bill
>
> ---------- Original Message ----------------------------------
> From: "Christina Z. Anderson" <zphoto@montana.net>
> Reply-To: alt-photo-process-l@sask.usask.ca
> Date: Fri, 09 May 2003 08:51:44 -0600
>
> >Good morning!
> > Does anyone use either hydrogen peroxide or potassium dichromate
added
> >to the developer or hp added to the sensitizer (the latter not for
> >palladium)?
> > Correct me if I am wrong here: added to the developer, dichromate
will
> >increase contrast? And hp will decrease contrast? Why does this happen?
> >Chris
> >
> >
> >
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