Re: Dark reaction in dichromated colloids

Sandy,
Ditto those findings for Photogravure.
I always freeze sensitized carbon tissue for later usage. No dark effect
whatsoever.
Craig Zammiello

----- Original Message -----
From: <sanking@CLEMSON.EDU>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Saturday, June 12, 2004 9:00 PM
Subject: Re: Dark reaction in dichromated colloids

> My experience is that freezing sensitized but unexposed
> carbon tissue at 40 degrees F or lower completely eliminates the dark
effect
> for all practical purposes for very extended periods. Tissue stored this
> way will
> have virtually the same printing characteristics six months
> or a year later as when freshly sensitized.
>
> Sandy King
>
>
>
>
> > What happens if you freeze it?
> >
> > In a message dated 6/12/04 10:25:36 AM, zphoto@uslink.net writes:
> >
> >
> >> You are absolutely right about dark reaction and humidity. In MT
> >> my
> >> darkroom was in the basement of the house(a half basement, not a deep
> >> one)--no windows, dark, cool, and dry, dry, dry. I could keep paper 6
> >> days
> >> I think, and it'd still work fine, albeit a bit darker orange. I cannot
> >> do
> >> that in either MN or SC, but considering dark reaction is affected by
> >> heat,
> >> humidity, and pH, MN and SC are out for the former two.
> >> Chris
> >>
> >
> >
> >
> >
> >
> > Mark Nelson
> > www.precisiondigitalnegatives.com
> >
> >
>
>
Received on Sun Jun 13 09:42:05 2004