In an attempt to initiate grafting, methyl methacrylate (MMA) has been grafted separately to Chokla wool and Mulberry silk in aqueous medium by using the potassium peroxydiphosphate-2-amino ethane thiol (PP-AET) system as redox initiator. Percent grafting is determined as a function of concentration of MMA, concentration of PP, concentration of AET, concentration of sulfuric acid, time, and temperature. Sulfuric acid is found to catalyze the reaction to a certain extent. The rate of grafting (Rp) and the induction period (Ip) of MMA are determined as a function of the total initial monomer concentration. The moisture regain properties and infrared spectra are studied. The reaction scheme is pictured.