Some introductions are conducted on the production techniques, technical characteristics, flows and quality of products in the copper recovery from the waste etching solution.
介绍了利用含铜蚀刻废液回收铜的生产工艺、技术特点、工艺流程和产品质量。
Copper Etching is an important step in the PCB production process.
蚀铜过程是生产线路板的一个关键步骤。
Aquatint: it is an etching process on copper or steel by means of nitric acid. in this technique a thin layer of resin dust is sprinkled on the plate and heated to make it adhere.
水彩色调：用硝酸在钢片或铜片上作腐蚀的蚀刻法。这个技巧是在版面上洒上一层薄薄的树脂粉，加热把它粘附于版面。
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