Re: tonal inversion and pigment loads

Heh! I forgot, sorry

Bye
Yves

----- Original Message -----
From: "Katharine Thayer" <kthayer@pacifier.com>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Thursday, January 26, 2006 9:21 PM
Subject: Re: tonal inversion and pigment loads

> I thought that Joe and Tom or somebody had already ruled out heat as
> a cause of this, in the last go-round.
> kt
>
> On Jan 26, 2006, at 5:55 PM, Ender100@aol.com wrote:
>
> > ;)
> >
> > In a message dated 1/26/06 2:25:15 PM, gauvreau-yves@sympatico.ca
> > writes:
> >
> >
> >> here is an idea, I think it is well known that heat by itself
> >> causes some
> >> cross-linking to happen and say under a step tablet where the
> >> density is
> >> high enough, exposure alone doesn't reach the gum but heat does.
> >> It could be
> >> that heat doesn't transform the gum dichromate in the same way as
> >> does
> >> exposed gum, in other word the two phenomenon don't "create" the
> >> same type
> >> of molecule and the cross linking of one may have different
> >> properties then
> >> the other or something like that.
> >
> >
> >
> >
> >
> >
> > Mark I. Nelson
> > www.MarkINelsonPhoto.com
> > www.PrecisionDigitalNegatives.com
> > PDNPrint Forum @ Yahoo Groups
>
Received on Fri Jan 27 01:00:46 2006