Re: Chrome Alum Hardening

Instead I found it was much lower and the proportion I tested was 0,1%
Why do you use such high % gelatin (5%)?
Everywhere is written a 2-3%
Giovanni

----- Original Message -----
From: "MARTINM" <martinm@SoftHome.net>
To: <alt-photo-process-l@sask.usask.ca>
Sent: Tuesday, October 11, 2005 11:51 PM
Subject: Re: Chrome Alum Hardening

>
> ----- 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 Wed Oct 12 01:53:09 2005