[pure-silver] Chemical questions: AmmoniumThiosulphate and Ascorbic Acid
- From: "Breukel, C. (HKG)" <C.Breukel@xxxxxxx>
- To: "Pure Silver (F) (E-mail)" <pure-silver@xxxxxxxxxxxxx>
- Date: Tue, 7 Jun 2005 11:41:46 +0200
Hi,
I obtained 2 old (perhaps older than 20 years) brown glass jars with
Ammonium Thiosulphate (made by BDH), stored in cool, dark place, lids
closed. I seem to recall that the solid Ammonium Thiosulphate does not
store well, butI cannot find this back. Is this true?
(I can always mix a bit of fixer and see if it clears film. It's a pitty
to throw out the stuff if it still works ok)
I alos obtained 3 different bottles of Ascorbic acid, 2 of them are
labeled L(+) one is labeled L (-), I know what that means (it's their
rotation direction in solution, the correct terminology escapes me at
the moment). I assume that their function as a developing agaent is the
same, is this correc?
thanks,
Best,
Cor
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