stop bath is mixed as follows:
part acetic acid (60%) + 30 parts water.
Length of treatment
in the 2% acetic acid stop bath: 20 – 30 s* (at 20 –
Longer treatment (more than 1 minute) would make washing
more difficult and reduces the storage lives of prints.The
stop bath can be replenished with a 5% acetic acid bath with mechanical
acetic acid (60%) + 11 parts water.