Before revision: Chrome agate (gray lines on a black background) chromium anhydride 300 – 400 gr barium acetate 5 – 10 gr zinc acetate 2 – 5 gr calcium acetate 4 – 8 gr water 1 liter, 30 - 40 C, 30 - 100A/dm2, duration 10 - 20 min, 6 - 9v, distance object anode 30 - 100mm.
After revision: Krom ahat (gray lines on a black background) chromium anhydride 300 – 400 gr barium acetate 5 – 10 gr zinc acetate 2 – 5 gr calcium acetate 4 – 8 gr water 1 liter, 30 - 40 C, 30 - 100A/dm2, duration 10 - 20 min, 6 - 9v, distance object anode 30 - 100mm.