The invention belongs to the technical field of color-coated sheet production, and particularly relates to a high-end
fluorocarbon building color-coated
sheet film thickness and
color difference stabilization control method which comprises the following steps: 1) performing pretreatment of
degreasing, rinsing, surface conditioning and re-rinsing on a base material; (2)
passivation is conducted, specifically, a
chromium-containing
passivation technology is adopted, and after
passivation, the weight of a chemical
coating film is controlled to be 25-35 mg / m < 2 >; after
drying and cooling, the temperature of the base material is 60-70 DEG C; (3)
coating, wherein the deviation of the
coating temperature is controlled within + / -0.5 DEG C; the RN two-roller reverse coating is adopted, and the roller speed, the roller pressure and the A-P roller gap of the P roller and the A roller are controlled; the
viscosity of the coating is controlled, the
color difference delta E of the coating is smaller than or equal to 0.5, and
delta b * ranges from-0.2 to-0.4; the plate temperature of the color-coated plate in a primary coating curing oven is controlled, and the
furnace temperature and the air speed of a fine coating curing oven are controlled, and the
cooling water temperature, the spraying pressure and the
drying temperature are controlled. The method has the advantages that the technical problems that in high-end
fluorocarbon building color-coated plate production, the film thickness control precision is poor and the
color difference is unstable for a long time are effectively solved.