RHODUNA® J1 Rhodium Electrolyte Brilliant white rhodium electrolyte for decorative applications WEBSITE : https://mds.umicore.com/en/electroplating/products/product-finder/rhoduna-j1-rhodium-electrolyte RHODUNA® J1 deposits brilliant white, very light and bright surface finishes. This makes the electrolyte ideal for use in decorative applications, such as jewelry, watches or spectacle frames. Special features are its high deposition rate and excellent throwing power. Furthermore, RHODUNA® J1 deposits layers 0.1 - 0.3 μm thick without cracking. Rhodium is deposited directly onto silver, gold, copper and copper alloys, nickel and nickel alloys. The electrolyte is suitable for rack and barrel plating. Electrolyte characteristics Electrolyte type Strongly acidic Metal content 2 (1.6 - 2.4) g/l Rh pH value < 1 Operating temperature 35 (20 - 40) °C Current density range 1 A/dm² Plating speed 0.025 μm/min at 1 A/dm² Anode material Pt-Ti (type PLATINODE® Pt/Ti) or MMO (Typ PLATINODE® 187) Coating characteristics Coating Rhodium Purity 99.99 wt.% Rh Colour of deposit brillant white Brightness bright Hardness of deposit approx. 800 - 900 HV Max. coating thickness approx. 0.3 μm Advantages Extremely light and bright coatings Good deposition rate Low porosity Excellent throwing power Layers 0.1 - 0.3 μm thick without cracking Suitable for rack and barrel plating Applications Jewelry Watches Spectacle frames Writing utensils