Nields & Lemack
Weldable colored steel sheet
 A colored steel sheet having a coating thickness which is sufficiently small to permit welding therethrough, and yet exhibiting an excellently colored and lustrous surface. It is a steel sheet having a surface plated with zinc or a zinc alloy, and carrying a chromate film formed on its plated surface, and a colored film formed on the chromate film from a composition comprising specific proportions of a thermosetting resin and a dye, which are both soluble in an organic solvent. The composition may further contain a solid lubricant, or a granular rust-inhibitive pigment, or both. The colored film has a specific range of thickness, and a color other than black. 
NKK Corporation
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C08K B05D Y10T C23C Y10T C09D B05D Y10T C09D B05D
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Toshiyuki Masaaki Toyofumi Tatsuya Naoto
Ookuma Yamashita Watanabe Miyoshi Yoshimi