Messing Schwärzen | Messing Brünierung selber herstellen

Can you chemically blacken brass yourself? I tried that and show my results. Recipe 1 for 250 ml solution (good result): 10g CuCO3 84ml ammonia solution (I used 10%) 167ml distilled water ------------------------------------------------ Recipe 2: (unfortunately without success for me!!) saturate distilled water with CuSO4 (i.e. until nothing more dissolves) then add sips of ammonia solution until the initial flakes dissolve again ------------------------------------------------ Tools / materials used: CuCO3: https://amzn.to/3wmQnCp * Liquid ammonia (ammonia 10%): https://amzn.to/3ipMVhY * Liquid ammonia (ammonia 25%): https://amzn.to/3IFwEAh * Beaker set: https://amzn.to/3Ns3FU2 * Respirator: https://amzn.to/3IL4dRo * Gloves: https://amzn.to/3DdNMMk * Goggles: https://amzn.to/3JJTfgl * Brass sheet (3mm): https://amzn.to/3IINWN0 * The marked links are Amazon affiliate links. If you buy something through one of these links, I get a small commission at no extra cost to you! ;) So you can simply support me and my work.