October 2005 Alt-Photo-Process-L: Re: Chrome Alum Hardening

From: MARTINM ^lt;martinm@SoftHome.net>
Date: 10/11/05-09:51:31 PM Z
Message-id: <005401c5cee0$3feb5270$389c4854@MUMBOSATO>

----- Original Message -----
From: "Keith Gerling" <Keith@GumPhoto.com>
To: "Alt-Photo-Process-L" <alt-photo-process-l@sask.usask.ca>
Sent: Tuesday, October 11, 2005 10:41 PM
Subject: Chrome Alum Hardening

> Does anybody know the proportion of chrome alum I should add to 5%
solution
> of gelatin for hardening purposes? The directions I found in the list
> archives turned my beaker of gelatin into a hardened mess within two
> minutes.

Some formulas for the making of silver halide emulsions suggest 0.25% chrome
alum per weight of gelatin.

Martin
Received on Tue Oct 11 21:51:00 2005