FWIW, I think phritz has a problem with
hardening as well. Chrome alum takes a really long time to harden gelatin. Some
report 7 to 8 days to fully cross link with a 3-5% solution. I think Ryuji
Suzuki mentioned once that it is the least effective hardener to use.
And BTW, I agree with Judy – let’s
trim those posts!
From: Tomas Sobota
Sent: Friday, October 09, 2009
Subject: Re: haunted GUM (i
Yes! Now that Christine and Loris mentioned it, I remember once using
paper that I had coated with gelatine but not hardened (it was paper originally
meant for oilprint). I forgot that it was not hardened and made a gum on it.
The result was more or less the same as Phritz gets. All black.
Some papers can be used without sizing at all, but it seems to me that
coating with gelatine and 'not' hardening doesn't work.