[alt-photo] Re: casein and tsp

[Marek Matusz]

Gord,
Sounds reasonable. It is known from old literature that casein can be solubilized    with a number of salts. WHat is actually at work is a high pH that partially hydrolyses the casein. To that effect hydroxide are effective, but also salts that in  would make high pH solution. Trisodium phosphate would certainly fit
Let us know what happens. I am quite happy with my ammonium carbonate recipe.
Marek
> Date: Wed, 4 May 2011 22:07:05 -0600
> From: gjh at shaw.ca
> To: alt-photo-process-list at lists.altphotolist.org
> Subject: [alt-photo] casein and tsp
> 
> I have some purified casein and am going to try casein printing again
> 
> I have this:
> http://www.sigmaaldrich.com/etc/medialib/docs/Sigma/Product_Information_Sheet/c5890pis.Par.0001.File.tmp/c5890pis.pdf
> 
> I am curious if anyone has used tri-sodium phosphate (TSP) as a casein 
> solvent rather than ammonia? TSP is used in a number of casein paint 
> formulas.
> 
> Gord
> 
> -- 
> Gordon J. Holtslander
> gjh at shaw.ca
> 
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