Posted by Adam Quinan on May 23, 2014 at 02:33:38 user Adam.
In Reply to: Re: 1st Edition for Sale posted by andy clayton on May 23, 2014 at 00:27:24:
Foxing is the brown staining of the paper caused by the oxidation (rusting) of tiny iron particles embedded in the paper. It is common in books and prints which are older.