MACO Eco Citrostop is an color indicator stop bath made for black and white film and paper. The color indicator displays the usage status of the stop bath by changing color. Eco Citrostop contains citric acid which is easier on skin and those allergic to acetic Acid.
Use MACO Eco Citrostop 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.