The color and appearance of the paint film are an important index to identify the decorative performance of the paint. Generally, it is compared with the standard model visually, and the art paint is identified according to its pattern. Methods as below:
(1) According to HG2-504-74 "Painting Inspection Method" and "Paint Film Preparation Method", respectively paint the sample and standard sample on the tinplate sheet of 50 mm x 120 mm x (0.2~0.3) mm, and paint the Uniformity and thickness should be consistent. The thickness of the coating film is limited to completely cover the bottom plate. Then dry according to the product standard. After the paint film is dry, cover the joint part, and check its color and appearance according to the product standard under natural scattered light. If there is no significant difference in color between the sample and the standard sample, it is considered to meet the technical requirements. tolerance range. The appearance should be flat, without crust, wrinkles, bubbles, cracks, etc., or inspected according to the product standards.
(2) After the paint film is hard-dried, compare the color appearance with two standard samples according to the product standard. If the color is between the two standard samples, it is considered to meet the tolerance scope.
