Re: cyanotype toning

Date view Thread view Subject view Author view

From: stan johnson (sjohnson@gwi.net)
Date: 04/30/00-08:17:31 AM Z


** Reply to note from Jonathan Long <fotonerd@yahoo.com> Sun, 30
Apr 2000 01:13:52 -0700 (PDT)
> Bleach/Amonia then to Tannic Acid. I guess both are a base are
> they not.
 
Ammonia is a mild base [alkaline], hypochlorite bleach [e.g., Chlorox] is
a strong base, sodium hydroxide [lye] with a strong oxidizing agent,
the hypochlorite.
 
Just be sure NEVER to mix ammonia with sodium hypochlorite! A very
toxic gas is formed--which has killed people who made the mix in
ignorance! So don't try a mixed 'bleach'...

stan

-- 
Stan Johnson 
sjohnson@gwi.net
04/30/00 10:17am


Date view Thread view Subject view Author view

This archive was generated by hypermail 2b29 : 06/13/00-03:09:50 PM Z CST