Dear Jason, No H2O2 + H2SO4 is called Piranha - guess why - and used to remove organics. There are 2 RCA cleans existing: SC1 (special clean 1) A mixture of 5 parts water + 1 part H2O2 (30%) + 1 part Ammonia solution (28%) used at about 65 °C. Mixture is stable for about 8 hours. The mixture is removing light organic contaminations, but is mainly dedicated to remove particles. SC2 A mixture of 6 parts water + 1 part H2O2 (30%) + 1 part HCl (32%). Is used after SC1 and intensive rinsing, to remove metallic contaminations and to grow up a chemical oxide. All parts are by volume! Best regards Armin ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com