What stop bath do you use?

I just use a little acetic acid (24%) in the water to make stop baths. I don't bother to messure...

Do you buy your stop bath, use glacial acetic adic or maybe citric acid?

Here are two Agfa recipes:

Stop Bath for paper, Agfa 200:

Glacial Acetic Acid (99%) - 20.0 ml Cold water to make - 1.0 liter

Stop Bath for films, Agfa 201:

Potassium Metabisulfite - 40.0 grams Cold water to make - 1.0 liter

Potassium Metabisulfite? This must be an expensive stop bath to use, and why this chemical?

[ Previous | Next ]