This product has been replaced by ADOSTOP ECO
Dilution 1+9 for papers, for films higher if desired.
If the acid is worn out the color of the bath changes from yellow to purple.
Stop bath saves you fixer and makes sure you don´t overdevelop.
Without stop bath it is difficult to manage your fixer´s capacity and this might lead to a total loss of the processed material (film or paper).
At least with films or fibre papers the use of a proper stop bath is highly recommended.
Fibre papers can show spots and marks if they are not stopped.
Stoping time between 30 seconds (1+10) and 1 Minute (1+40).