Ilford Ilfostop Stop Bath 500ml

Ilford Ilfostop is a low-odour, liquid concentrate citric acid stop bath essential for black and white film and darkroom paper processing. This economical chemical immediately halts the development process by neutralising the developer, whilst extending the life of your fixer solution. Simply dilute at 1+19 (one part concentrate to nineteen parts water) for use in tank, tray, or dish processing. The 500ml bottle produces 10 litres of working solution, capable of processing approximately 150 rolls of 135-36 or 120 film, 600 8×10″ RC prints, or 300 8×10″ FB prints. An integrated pH-sensitive indicator dye changes colour from yellow to purple as the stop bath becomes exhausted, providing a visual cue for replacement.

• Liquid concentrate formulation for economical use
• Low-odour citric acid formula suitable for both film and paper
• Dilution ratio 1+19 produces 10 litres from 500ml concentrate
• Indicator dye changes yellow to purple when exhausted
• Compatible with dish/tray paper processing and deep tank film processing