The Photographer's Formulary Spotting-Reducer I Retouch for Paper is intended to be used for the removal of small black spots that are often found in a print due to small white flaws in a negative. The reducer is quite powerful and acts quickly.
The chemicals in this kit are used to prepare two stock solutions. Both stock solutions are stable for an extended period of time, but the working solution, which is mixed just prior to use is discarded after a working session.