Re: glyoxal yellowing now: How do you know it's hard?

> I think 3-aminopropyltriethoxysilane is incompatible with water or
> admixtures consisting of water and hydrophillic molecules, and it
> doesn't work like a surfactant, so I think a separate step is
> necessary.

No, it can be done in one step. By the way there are a couple of patents
referring to that possibility...

Martin

----- Original Message -----
From: "Ryuji Suzuki" <rs@silvergrain.org>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Saturday, February 05, 2005 9:04 AM
Subject: Re: glyoxal yellowing now: How do you know it's hard?

> From: MARTINM <martinm@SoftHome.net>
> Subject: Re: glyoxal yellowing now: How do you know it's hard?
> Date: Sat, 05 Feb 2005 05:28:43 +0100
>
> > Another approach consists of using silane for the subbing: rub the
> > (clean/degreased!) glass plate with a 1% freshly prepared acetone
> > solution of 3-aminopropyltriethoxysilane over one or both sides with
> > a tissue for about 1 min until the solvent has evaporated.
>
> That's another good way to improve the adhesion on glass.
>
> > Philippe Monnoyer recommended incorporating silane into a gelatin
> > solution. It may be a good idea to add a small amount of that above
> > mentioned silane mixture to your gum solution.
>
> I think 3-aminopropyltriethoxysilane is incompatible with water or
> admixtures consisting of water and hydrophillic molecules, and it
> doesn't work like a surfactant, so I think a separate step is
> necessary. So far I get excellent adhesion by my gelatin blend, so I
> don't think I'll go to the trouble of an extra step...
> --
> Ryuji Suzuki
> "People seldom do what they believe in. They do what is convenient,
> then repent." (Bob Dylan, Brownsville Girl, 1986)
Received on Sat Feb 5 03:45:31 2005