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There are many types of corrosion signs. Today we will introduce aluminum corrosion signs.
1) 30 pieces of chemical corrosion; one piece of electrical corrosion.
2) 30 pieces of chemical corrosion, 99% are qualified products; one piece of electrical corrosion is scrap products.
In other words, in terms of corroding aluminum plates, traditional chemical etching methods are used.
Corrosion card making requires every step of the process, so be careful. The process of etching signs, whether it is a resist film, or an etching solution and an etching method, has been in recent years.
There have been major changes. But all these changes should be acknowledged, it is gradually developed from the traditional etched sign.