[alt-photo] Re: casein and tsp

[Gordon Holtslander]

Is this your ammonium carbonate formula?

2 parts Casein Powder16 parts water1 part Ammonium Carbonate
(or clear liquid ammonia*)Dry Pigments paste water
How are you sizing?

----- Original Message -----
From: Marek Matusz <marekmatusz at hotmail.com>
Date: Thursday, May 5, 2011 8:30 am
Subject: [alt-photo] Re: casein and tsp
To: alt photo <alt-photo-process-list at lists.altphotolist.org>

> 
> 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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