Process operating conditions of Metal Etching

Metal Etching is the key to the pattern decoration process of the metal plate mold. To obtain a pattern product with clear stripes and strong decorativeness, attention must be paid to the conditions of the etching process. Mainly the temperature of the etching solution and the etching time. A slightly higher temperature of the solution can increase the rate of metal dissolution, that is, the rate of etching, and shorten the time required for etching. However, the etching solution is generally a strong acid. The strong acid is corrosive at high temperatures and is easy to protect. The coating or corrosion-resistant ink softens or even dissolves, so that the adhesion of the corrosion-resistant layer of the non-etched part of the metal is reduced, which causes the corrosion-resistant coating at the junction of etching and non-etching to fall off or melt, which makes the etching pattern blurred and distorted, affecting the pattern Because of its beautiful appearance and decorative effect, the temperature should not exceed 45°C.
Similarly, if the etching time is too long, especially when the temperature of the etching solution is high, the immersion time of the corrosion-resistant ink or protective coating is too long, it will also have the above-mentioned side effects and adverse consequences, so the time control should also be appropriate , Can not be soaked for too long, generally should not exceed 20-25min.
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