Method for manufacturing gravure-transfer-coated steel plate

A method for manufacturing a continuous gravure-transfer-coated metal plate by transferring a pattern over a continuous metal plate wound in the form of a coil using a gravure transfer sheet, comprising the steps of:

• coating, over the metal plate, a primer coating material consisting essentially of 20 to 40% of a polyester resin having a number average molecular weight of 5,000 to 20,000 while exhibiting a glass transition temperature of 10 to 50° C., 4 to 15% of a melamine resin, 1 to 10% of a urethane resin, 0.3 to 3% of isocyanate, 15 to 35% of a pigment, 30 to 50% of a hydrocarbon and ester-based mixed solvent, and 1.5 to 3% of additives;
• heating and setting the primer coating layer in a hot-air-blowing dry oven, thereby forming a lower coating layer;
• thermally pressing a gravure transfer sheet, printed with a desired pattern on a base film layer thereof, onto the lower coating layer;
• releasing the base film of the gravure transfer sheet from the lower coating layer, thereby transferring the pattern, as a transfer coating layer, to the lower coating layer;
• coating, over the transfer coating layer, and upper coating material selected from the group consisting of a thermosetting fluorine resin, a thermosetting polyester resin, and an ultraviolet-thermosetting polyurethane-acryl-based resin;
• and
• heating and setting the upper coating layer or radiating ultraviolet rays onto the upper coating layer, thereby forming an upper coating layer.