Re: Glyoxal?

Marek, do you use any clearing agent for gelatine/dichromate size? I noticed the paper base warms when sized with this combo... I rinsed the sized papers for about 1 hour, yet there was a pretty perceptible difference between the sized and unsized paper base.
 
Regards,
Loris.

        -----Özgün İleti-----
        Kimden: Marek Matusz [mailto:marekmatusz@hotmail.com]
        Gönderilmiş: Sal 17.01.2006 18:56
        Kime: alt-photo-process-l@sask.usask.ca
        Bilgi:
        Konu: Re: Glyoxal?
        
        

        All,
        I would add even one more factor to this glyoxal issue and gum observations
        in general. Most of the observations are not made with scientific
        instruments, where the readings are objective from place to place. They are
        made by looking at, feelingt the samples, etc, very objective tests in their
        nature. For example what Katharine might call a non-yellowing glyoxal siezed
        paper might be a slight yellow tint to Chris. When I first used glyoxa /
        gelatine mix I decided I got no yellow stain, later I changed my mind and
        said that slight yellow stain was observed. I rinse my papers the day after
        they are sized, which keeps tha papers white and pre-shrinks them at the
        same time. I am still experimenting with the most conveniet way to sieze the
        papers for gum.
        I have been experimenting with gelatine/dichromate with quite good results.
        Marek, Houston