Hi, After some reading here I decided to use white wine vinegar as stop bath. My father has a grocery, so it will cost me nothing. The question I have is about the dilution of the vinegar. Normally it has 6% acidity, but the working solution must have 1,5% or 2%? That means a 1:3 or 1:2 dilution, right? Other thing, should I use the same dilution for film and paper? And how many 35mm films and sheets of paper (8x10) can I work with one working solution before it looses is strength? Or is it better to use it has one-shoot only? Thanks in advance. Best regards, Nuno Campos.