Re: Cleric's Gold Toner

[Greg Schmitz <gws1@columbia.edu>]

Bob,

There are several editions of Clerc.  The one I have in front of me is:

Clerc, Louis Philippe.  Photography, theory and practice.  English
edition  of "La technique", by L.P. Clerc, edited by George E. Brown.
London:  Sir I. Pitman & sons, ltd., 1930.

There are also later editions from Pitman, Focal Press and Amphoto some 
of which differ considerably from the earlier editions.  I'll send you 
a  PDF  of  the formulas in the 1930 edition.


Robert W. Schramm wrote:
> David,
>
>    Thanks for the formula and the correction on the spelling. It looks 
> like reagents are acids or salts
> so my guess is that the toner is already acidic. I doubt if the 
> additional Tartaric Acid would change the pH so are likely correct in 
> that all it would do would be to dilute the toner. With toners, 
> sometimes a slight changed can produce an interesting result.
>
> Bob
>
>
>
> Check out my web page at:
>
>  http://www.SchrammStudio.com