Name: RHODUNA® J1 – Initial Concentrate (Initial Rhodium Bath Preparation Concentrate). Concentration of Rhodium Metal: Contains 2 grams of Rhodium (Rh) in the 100 ml package (i.e., at a rate of 2g Rh / 100 ml). Usage: Used for plating jewelry and gold and silver pieces with brilliant white, shiny rhodium (Brilliant White). Expiry Date: 06/2028. Country of Manufacture: Germany (Made in Germany).