Re: Another gelatin hardening question

From: Dave Rose ^lt;[email protected]>
Date: 07/14/04-07:43:03 PM Z
Message-id: <008c01c46a0d$1175fa00$26cc9045@dave6m4323wvj7>

Try using formaldehyde to harden gelatin sizing. I've used it for years,
printing cyanotype and gum with great results. It yields ready-to-print
paper in 24 hours or less with no need for extended curing periods. It's
very windy and dry here, so that's a factor.

Best regards from Big Wonderful Wyoming,
Dave Rose

----- Original Message -----
From: "Keith Gerling" <>
To: <>
Sent: Thursday, July 15, 2004 3:50 AM
Subject: Another gelatin hardening question

> After a batch of paper has been sized and dried, I usually put them all in
> stack and flatten them under a heavy weight. Is this bad? Does the
> hardening process like to have a flow of air?
> -----Original Message-----
> From: Keith Gerling []
> Sent: Thursday, July 15, 2004 3:53 AM
> To:
> Subject: Gelatin hardening question
> I've been having some sizing problems lately. Problems I never have in
> months that are cold and dry. I harden gelatin with chrome alum and give
> a day to harden. Searching through the archives, I found a post where
> Philippe Monnoyer mentions that chrome alum takes up to a month to
> completely harden. Can someone elaborate on this? The degree of
> per unit of time is obviouslynot linear. What degree of hardening takes
> place in 24 hours? How about in a week? Would glyoxal harden faster?
> Lastly, is higher heat and humidity known to have a factor in the
> process?
> Thanks.
> Keioth
Received on Wed Jul 14 19:43:19 2004

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