Re: Alt print on Glass?
I work directly my Carbon Transfer on Glass
It is wonderfull
Philippe
----- Original Message -----
From: "Tom Sobota" <tom@sobota.net>
To: <alt-photo-process-l@usask.ca>
Sent: Monday, May 18, 2009 6:21 PM
Subject: Re: Alt print on Glass?
Jacek,
Printing on glass is not very difficult but the exact procedure depends
on the process.
I have made three-color gums on glass, but gum doesn't stick very well
on plain glass, so I first 'frosted' the glass surface with carborundum.
Well, actually a valve-polishing compound that has carborundum.
I use carborundum because just 'sanding' the glass is, in my
experience, very slow.
On the other hand, gelatin sticks to clean plain glass very well, so any
gelatin based process such as carbon works very well without the need of
any additional substrate. But the glass has to be VERY clean, and that
means at least some ammonia-based detergent. You could also consult
instructions for preparing glass for collodion. Glass is notoriously
difficult to clean well :-)
For maximum adherence of gelatin you could use some sodium silicate
substrate as used for collotype. However, for a quick test a reasonably
clean glass will do.
You don't need to brush the gelatin on the glass. Just flow it from a
flask, and help to spread it with a finger (or a glass rod). The gelatin
will dry to a nice transparent thin coat. Keep the glass warm while
spreading, and then cool it on a very level surface.
cheers
Tom Sobota
Madrid, Spain
Jacek Gonsalves wrote:
Hi all,
Has anyone had success on printing on glass? I'm going to try and
brush a gelatin coat on and see how that goes. Hopefully the gelatin
will stick, though perhaps I need to sand the glass slightly to give
it some tooth?
From there I'm going to try a cyanotype print. Should be intresting!
Cheers
Jacek
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