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A low odour citric acid-based darkroom process stop bath with an indicator dye. Stops film or paper development immediately, and is suitable for bath or machine applications. Economical dilution of 1+19: makes 10 litres.
Ilfostop contains an indicator dye which changes colour from yellow to purple when exhausted.
Helps maintain the activity and prolong the life of the fixer by reducing carry-over of excess developer (alkaline) into the fixed (acid).
Time needed: 10 secs at 20°C.