I asked Dr. Robert Chapman, who has written the "Photochemistry" column in
_Photo Techniques_ magazine for many years, to comment on citric acid stop
baths. He wrote:
>>>
On to the citric acid stop bath question. Indeed, these are used, although
not as frequently as those based on (cheaper) acetic acid. The formula below
is an example.
Kodak SB-7 stop bath
citric acid 15 g
water 1 liter
<<<
I have no problem with glacial acetic acid, but I think I might switch to
citric acid anyway.
--Mike
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