From: Sandy King (sanking@clemson.edu)
Date: 02/05/03-11:52:50 AM Z
Knox plain food gelatin is widely available in the US and it has
worked fine for me in most photographic applications. It is a porcine
skin gelatin that has approximately the same viscosity and setting
characteristics of a 150-200 Bloom gelatin.
Sandy King
>From: "Gordon J. Holtslander" <holtsg@duke.usask.ca>
>Subject: Re: oil printing & hard gelatin
>Date: Wed, 05 Feb 2003 09:48:03 -0600 (CST)
>
>> In Barnier's chapter on oil printing in "Coming into focus" he says
>> hardening is unesseccary for the matrix if a hard gelatin is used. He
>> recommends three coats of gelatin, hardening if a soft gelatin is used,
>> and then superdrying the matrix (heating the matrx).
>
>I see. I'm not familiar with the process, but dry strength can be
>increased by making the coating material thick (viscous) by increasing
>the gelatin, and set (gelate) at a low temperature, and then dry
>it. Of course, this may require better coating technique.
>
>I don't know how food grade gelatin compares to photographic grade
>gelatin. Is there any gelatin from grocery store that people have
>information as to Type A/B, source (bone, hide, etc.) and bloom
>strength?
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