- Apr 1, 2019
Hello, everyone, we haven't updated the development progress for a long time. When we produce metal parts, we find that one part has been unable to meet our requirements. This problem will be solved in the next few days. We tested a blackening agent for zinc alloy. Here we share it with you. It consists of three parts, 1. Surface activation (I personally think low concentration hydrochloric acid) 2. Blackening agent (I don't know what ingredients) 3. Surface isolator (similar to varnish), because the liquid can't be mailed, I think you can buy similar products locally. The development is expected to be completed in the next week. Thank you again for your attention.