MACO Ecostop is a classic stop bath for black and white films and paper. Ecostop can be used universally and contains acetic acid.
Use MACO Ecostop Universal Stop Bath Concentrate at a dilution of 1+19. 1 Liter makes 20 liters of working solution.
The Brownie Camera Guy says:
“Eco” in Ecostop stands for Economic, which this stop bath certainly is.