[pure-silver] Re: William Mortensen's Glycin Developer
- From: Michael Briggs <MichaelBriggs@xxxxxxxxxxxxx>
- To: pure-silver@xxxxxxxxxxxxx
- Date: Mon, 20 Dec 2004 13:18:11 -0600 (CST)
On 20-Dec-2004 Koch, Gerald wrote:
> Gradol is paraminophenol hemisulfate. An equal weight of paraminophenol
> hydrochloride can be substituted.
What is the source for this identification of Gradol? The booklet "The Edwal
Professional Photographers' Manual" that I have identifies it as "a derivative
of para aminophenol" without being more specific.
--Michael
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