big precautions re; aqua regia!!!!!!!!!!!!!
I just googled aqua regia. several hits and a recipe. one part hydrachloric acid ,3 parts nitric acid, one part distilled water. if my old days in the chem lab serve me, its acid into water, other way around and you will get a violent reaction. after use dispose of. don't and i repeat don't put it in a sealed bottle. build up of gases could very well cause it to explode. if not mixed correctly and in proper sequence there can be major hazards. use and or mix this if you follow directions carefully and know what your doing. this is nasty stuff and you could get hurt if used improperly.
S/V Que Pasa?