I know this may seem like a silly question... but what does a stop bath do? Either for film dev, or print dev? I realise that it's designed to "stop the developer" but surely if you've got your exposure spot on when developing a print you don't really need it stopped as it won't develop any further, all you really need is a wash? In fact, if you're quick, surely a wash would work just as well for both? I only ask because my college don't actually have a stop bath (well, they do, but it's just water) so I was slightly worried whether there'll be any long term effects on my prints, especially as I'm now starting to sell some.