There are many methods of processing on stainless steel surfaces, which can be roughly divided into two types. One is to treat stainless steel with surface gloss, and to use art processing to form a pattern using luster contrast; the other is to assign color to the composition of patterns. Art processing. Typical examples of the use of the screen printing method include etching and spray painting.
Etching processing method is to screen the acid-proof protective film on the stainless steel surface by screen printing, and then etch it with ferrous chloride solution to form an artistic pattern. The spray color method sprays pigment particles after screen printing to form a pear-like surface and form an artistic pattern.
In recent years, in order to adapt to the diversification of the use of stainless steel and higher and higher artistic requirements, the “color art†processing method with color has been developed and has become the mainstream in this field. Among the methods for imparting the color of stainless steel include a method of performing firing after screen ink printing and a chemical coloring method.
The process of chemical coloring of stainless steel products is: stainless steel products → screen printing → oxidation coloring → alkali treatment → finished products.
The etching art process of stainless steel products is: stainless steel products → silk screen → etching → alkali treatment → oxidation coloring → finished products.
The process of spray painting of stainless steel products is: stainless steel products → silk screen → etching → alkali treatment → screen printing → oxidation coloring → alkali treatment → finished products.
The stainless steel chemical coloring method does not use pigments and dyes, but soaks the stainless steel in a warm concentrated chromium sulfate solution to perform chemical coloring, which is characterized by good resistance to food. The ink used in this processing method must have a very strong acid resistance, and UV curing inks having special properties suitable for the processing process are generally used.
Source: Guangdong Printing