What are the polishing methods for copper? What are the precautions?

Polishing, machine, grindstone, products unchanged. Adding polishing solution, the dosage is: the ratio of product to polishing solution = 100: 1, and the polishing time is about 40 minutes. At this time, the product is bright, and surface treatment such as electroplating can be carried out. The washing water is 80% clean. Take out the product for oxidation resistance treatment, and dry it after electroplating and polishing. Let me briefly talk about brass chemistry. The workflow of chemical polishing of brass is as follows: (1) Water operation is not allowed during polishing operation, which will affect the polishing quality. Please use the stock solution and operate in a ventilated place at room temperature. (2) Immerse the copper workpiece in the copper polishing solution, take out the copper workpiece after about 2-3 minutes, immediately put it into clean water for full washing, and rinse the chemicals on the workpiece. (3) After the copper workpiece is polished and cleaned, it can enter the next process, such as spraying and passivation. In order to prevent the copper workpiece from discoloring again, it should be air-dried and passivated. (4) In the polishing process, when it is found that the glossiness of copper can not meet the requirements, a small amount of long-acting additives should be added to the polishing solution. The replenishment amount is 1%-2% of the original polishing solution, and it is better to add a small amount of additives several times. When the color of polishing solution is dark green, if the requirements cannot be met after adding long-acting additives, a new polishing agent should be replaced for polishing.