What is the reason for the lack of luster on the surface of the color-coated galvanized steel coil

1. The surface of the substrate is too rough or contains oil, moisture, wax, etc., and the coating is not fully cured.

2. The paint of the color-coated galvanized steel coil is not sufficiently mixed before the machine is put on the machine, and the solid content of the paint settles at the bottom of the barrel, so that there is less pigment in the working barrel during construction.
3. Excessive addition of diluent to the coating dilutes the effect of the glossy coating.
4. The reason for the paint formulation of color-coated galvanized steel coils is that there are too many pigments, fillers and solvents in the paint, and the fineness is not enough or there is dust.
5. The surface coating of the color-coated galvanized steel coil is too thin, and the temperature of the roller coating room is too high or too low during construction. In addition, the temperature of the curing furnace is set too high, the amount of hot air circulation in the furnace is insufficient, and the coating is over-baked, which will also cause the surface of the color-coated coil to be dull. Therefore, the above should be avoided when using it. problem to ensure the gloss of the color-coated roll surface.

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