Gold Acid Testing: Preparation & Reliable Suppliers - JewelryAppraiser.info

Question
how to prepare 10k,14k,18,22k acid to test gold

Answer
The best service I could offer is to have you contact Ross Metals. They are located on 47th Street in New York City, NY. They can set you up with the Acid pre mixed with indicator tests and a good source to purchase it.
Sincerely,
Arthur DeMello GG (GIA)
http://www.jewelryappraiser.info