STOP BATH FOR BLACK-AND-WHITE PHOTOMATERIALS
The product has been produced and marketed in conformity with a quality system according to the international standard
FOMACITRO is a liquid concentrate of a citric acid-based stop bath - a recommendable complement in processing of
negative/positive black-and-white photomaterials both for amateur and professional use. FOMACITRO is completely odourless.
FOMACITRO is available in PE-bottles of 250 ml.
The amount of photomaterial processed depends on type and dilution of developer used. A colour change of stop bath working
solution from yellow-orange to blue-green signals that the bath is exhausted and should be changed for a fresh one.
Preparation of working solution
For use, the concentrate is diluted with water in the ratio of 1 + 19.
When the exact stopping of development is needed (e.g. during extremely rapid development), the photomaterial is put from the
developer directly into the prepared stop bath. The alkaline developer in swollen gelatine is being neutralized, looses its reduction
ability, and the development is immediately interrupted. The incorporation of a stop bath into processing procedure prevents fixer to
be contamined by developer rests so that its life will be prolonged.
Stopping time at 20 °C
- 10 to 20 seconds for films and papers on the RC paper base
- 30 seconds for papers on a baryta paper base
FOMACITRO should be stored in the original packaging at a temperature ranging from 10 to 21 °C. Diluted working solution can be
kept refrigerated at 0 to 6 °C for one month.