tourmaline Austria

...Tourmaline is used for browning brass and copper. The process is odorless, can be carried out at room temperature, and does not leave black fingers. The browning process can be stopped at any time. You can use Tourmaline undiluted or dilute it with tap water in a ratio of 1:3 to 1:5 to create a browning bath. To ensure that the surface is free from acids, the draining water should be tested for neutrality with indicator paper. Container size: 5 KG Application area: Browning Special feature: odorless; no black hands...