Re: Adhesion

> Between these supports, there is a big difference in dimensional
> stability and elasticity of the support. Paper base will swell and
> expand to some extend to accomodate the same in the gelatin, but glass
> won't.

No doubt. The parallel I saw was with respect to adhesion to a support.

> What's your rough swell factor, and in what kind of pH range of
> gelatin solution does this particular silane effective with gelatin?

I gathered the silane thing was not pH dependent.

I have no idea about the swell factor (how would I measure that?). With
regards to
hardening, my main criterion is whether the emulsion does withstand the
processing solutions, from pH 2.0 (bleach) to 11.5 (developer).

Martin

----- Original Message -----
From: "Ryuji Suzuki" <rs@silvergrain.org>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Sunday, February 20, 2005 4:38 PM
Subject: Re: Adhesion

> From: MARTINM <martinm@SoftHome.net>
> Subject: Re: Adhesion
> Date: Sun, 20 Feb 2005 06:40:27 +0100
>
> > Sorry to send this message once more - I already sent it yesterday but
it
> > didn't seem to have been posted to alt.photo...
>
> I have the same problem.
>
> > Just a guess but I assume the situation of a silane/gum coated glass
> > will not greatly differ from that of a gum coated paper.
>
> Between these supports, there is a big difference in dimensional
> stability and elasticity of the support. Paper base will swell and
> expand to some extend to accomodate the same in the gelatin, but glass
> won't.
>
> > If that particular silane ( 3-aminopropyltriethoxysilane) really
> > behaved the way I believe, the only relevant region would be where
> > gelatin/gum gets in contact with the glass. I assume this to take
> > place on a "sub"-nano level AND NOT throughout the whole layer
> > thickness. But as you already pointed out, unless someone
> > tried... Well, at least with gelatin it works.
>
> What's your rough swell factor, and in what kind of pH range of
> gelatin solution does this particular silane effective with gelatin?
>
> --
> Ryuji Suzuki
> "Well, believing is all right, just don't let the wrong people know
> what it's all about." (Bob Dylan, Need a Woman, 1982)
Received on Mon Feb 21 12:27:09 2005