| 摘要 |
PROBLEM TO BE SOLVED: To provide a coated steel plate that can be produced by a two-coat two-bake method, has corrosion resistance, and exhibits a black color of sufficiently low brightness and high glossiness while a rust-preventive pigment is blended in an undercoat film.SOLUTION: A coated steel plate 10 has a steel plate 11, an undercoating film 13 and a topcoating film 14 in this order. The undercoating film 13 comprises a resin 15, a black pigment 16 and a rust-preventive pigment 17. The difference obtained by subtracting D50 of the rust-preventive pigment 17 from the film thickness of the undercoating film 13 is 0.5 μm or more. The content of the rust-preventive pigment 17 is 50 pts.mass or less based on 100 pts.mass of the resin 15 and the refractive index of the rust-preventive pigment 17 is 2.1 or less. The refractive index of the topcoating film 14 is 1.45 or more and the haze of the topcoating film 14 is 7% or less. The coated steel plate 10 has corrosion resistance and exhibits high glossiness and a black color such that it has an L value of 10 or less in Hunter Lab color system and a 60° glossiness of 80% or more. |
