1, aluminum veneer surface treatment is usually spray processing, also have a small amount of roller coating aluminum veneer, restrictions are imported production equipment, roller coating aluminum veneer price on the high side, spraying aluminum veneer on the market at present the majority, spraying aluminum veneer surface treatment should be consistent with industry standard of the architectural aluminum, aluminum fluorocarbon coating.

2. When viewing the surface of the coating vertically from a distance of 3m under natural light, the coating shall have no flow marks, cracks, bubbles or other surface defects. Scratches and abrasions within one square meter of the outer surface of the coating shall comply with the provisions of JG3035-1996.

3, for the slight scratches and bubbles on the surface of the coating, can be repaired by the paint supplier recommended room temperature curing system of paint, repair should be the same as the color and luster of the original coating, and the sample according to the standard section of adhesion test, should still adhere to the original coating, curing conditions according to the paint dealer.

4. When dry film thickness is measured by digital coating measuring instrument according to GB1764 method, the mean value of total dry film thickness should not be less than 30um. Points below 25um or 85% of the specified thickness value are not allowed for multilayer coatings with primers. Finish paint (paint) thickness is not less than 25um. The primer thickness is (7.5±2.5) um, and the coat thickness is 10-20um.

5, according to the variety of finish, coating process can be divided into two coating, three coating and four coating. The total dry film thickness of the second coating should not be less than 30um, and the third and fourth coating should not be less than 40um.

Due to the limitation of processing equipment, as well as the complexity of the workpiece (such as the inner corner, inner groove, plate flanging, etc.), the total thickness of the dry film in these parts is allowed to be lower than the specified value, but it is not allowed to leak the bottom bit.