A safe, easy-to-use compound for removing fire scale and oxidation from gold, silver, and copper.
It contains sodium bisulfate in a dry granular powder form. It is ready to use by adding water according to directions. Steel or iron will contaminate the solution so use copper tongs. Also, do not put spring rings or lobster claws into pickle. The springs in these clasps are steel and will be damaged.
For every 14oz of lukewarm water (just below 125F) mix in 5oz (about 1/2cup) of Sparex in an acid-proof container. Stir until dissolved.
A pickle pot (PB400) is perfect for keeping your pickle solution warm.