Photographers' Formulary 03-0188 TS-4 Odor-Free Stop Bath for Darkroom TS-4 Odorless stop bath for prints or film The unused solution keeps indefinitely, after the first use it should not be kept more than two month Capacity is about 20 8X10-inch prints per litre of working solution Capacity is about 29 rolls of 120 film, or approximately 29 rolls of 135-36 film, per liter of working solution Completely odor free Works with prints or film Economical to use 10-liters stock solution