| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for easily drawing various patterns, on a large- scaled enameled casting such as an enameled cast bath tub with no need for skill, and without giving any damage to the enamel. SOLUTION: This method comprises applying a lower glaze on the substrate 2 of the cast bath tub 1 with a wet process, forming the undercoat layer 3 by drying and baking it, immediately sprinkling an upper coating powder through a sieve on the surface, and baking it to form the upper coating layer 4, spraying an upper coating powder of a different color with an electrostatic powder gun, on the surface of a flange part 1a of the bath tub 1, forming a gradation 5a of different tints, and baking it, and, sprinkling a hyaline glaze through a sieve on the surface and baking it to cover the surface with a hyaline layer 6.
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