U of S | Mailing List Archive | alt-photo-process-l | Re: I'm back! Hi to all + Silane?

Re: I'm back! Hi to all + Silane?



Bad news then... On the other hand, I used Daler-Rowney's System3 acrylic
gesso for making gum prints. But only after coating further (the gessoed
aluminum sheet) with calcium carbonate / gelatin mixture. It worked well.
(Thanks to Keith for the tip!)

Casein seems to stick on plain glass very well, it dissolves easily too.
But I haven't tried to expose and harden it yet. That would be the real
test - since we need a hardened layer that manages to stay on glass during
development.

Regards,
Loris.

18 Haziran 2008, Çarşamba, 4:23 am tarihinde, Ryuji Suzuki yazmış:
> From: Loris Medici <mail@loris.medici.name>
> Subject: Re: I'm back! Hi to all + Silane?
> Date: Tue, 17 Jun 2008 22:49:06 +0300 (EEST)
>
>> Or, is it clear acrylic gesso (= plain acrylic medium in
>> other words)? I guess almost every ready-made gesso is based
>> on acrylic...
>
> Acrylic medium can be dispersed in water, but once they dry,
> they make rather hydrophobic surface and I bet it will not
> help gum to adhere. Not a good choice for subbing.
>
> Acrylic gesso products usually contain fine granules of
> acrylic plastic material that is already in hydrophobic
> state. They don't really help adhesion of hydrophillic
> material like gum.
>
> I am not very familiar with casein's chemical properties. Will
> have to do a quick research when I get home and I'll report if
> I find something worthy of reporting before I finish tonight's
> dose of Malbec.