Tinker if your looking at mixing formulas yourself make sure you read up on it all I have been browning for years and my advice would be avoid anything that has mercuric chloride other names for it are corrosive sublimate, bi chloride of mercury,muriate of mercury, its poison of the worst kind, you guys have have several ready made formulas over there that would be the best place to start, or send your work to one of the pros.