Re: Questions on hardening gelatin

From: MARTINM ^lt;martinm@SoftHome.net>
Date: 10/04/05-06:24:37 AM Z
Message-id: <000901c5c8de$9b0a5e10$7e994854@MUMBOSATO>

----- Original Message -----
From: "Keith Gerling" <Keith@GumPhoto.com>
To: "Alt-Photo-Process-L" <alt-photo-process-l@sask.usask.ca>
Sent: Monday, October 03, 2005 6:07 PM
Subject: Questions on hardening gelatin

> I'm wondering if someone could comment on the length of time it takes for
> the various gelatin hardeners to perform the hardening function. It is my
> understanding that gluteraldahyde will harden in an hour or so, and that
> chrome alum takes a week.

Raising the temperature does accelerate chrome hardening considerably.
E.g. at 60C it might take around one hour to harden a dry gelatin layer.

Martin
Received on Tue Oct 4 06:20:57 2005

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