Indicator-Stop Bath

WMI Indicator-Stop Bath is a low-odor acetic stop bath.
Used in photographic processing to stop the action of a developer on a film, plate, or paper. It helps to prolong the life of the fixer solution by reducing the carryover of excess developer (alkaline) into the fixer (acidic) and to maintain the activity of the fixer.

Professional Concentrate’s PDF Find a Dealer

Category: Tag:


  • Catalog #: PH-IND STOP BATH 16 x16
  • Contents: 16 fluid ounces (473 ml) Per Bottle 16 Bottles per Case
  • Indicator: The indicator component contains a dye that is pH sensitive and changes color from yellow to purple to signal exhaustion.
  • Note: It is not recommended for machine processing applications as the short fix and wash times often used may leave a residual dye stain on films and prints.
  • Use:
    • Dilution:  1+63 1 Pint (16oz) makes 8 Gallons
      Dilute 16 mL with 984 ML = 1 Liter
    • Temperature range: 18–24 ºC (64–75ºF)
    • Time for film and paper: 10 Seconds 20ºC (68ºF) Minimum

The process time given is the minimum required, a longer time in the stop bath may be used if necessary. If staining occurs, thorough washing will remove it.


Professional Concentrate’s (PDF)