1 How Acid bite shadow
1 How Acid bite shadow
Formula 1 with an Sulfur acid
Sulfur acid can be used steel nickel, copper, brass and metal containing copper This type of surface etching is not so much shine and mature skin. Formula should be used with 3 to bite the skin shiny.
Liquid mixture.
Kam Ma Sulfur acid in the ratio of 50-10% water by volume. The mixed acid must be mixed into the water as always (remember the rules AAA - Always Add Acid), so if you want a mixture of 1 liter (mixed 5%) will have to prepare faithful water 950 cc. And then to add acid until the volume of 1 liter
Use.
Dipped into the specimen. Takes about 2-3 minutes.

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