| 摘要 |
PROBLEM TO BE SOLVED: To provide a marking composition which can develop color to a distinct black color by irradiating a laser beam. SOLUTION: The resin composition for laser marking is characterized by containing (A) 100 pts.wt. of a thermoplastic resin, (B) 0.5-10 pts.wt. of a calcium carbonate, and (C) 0.001-5 pts.wt. of a colorant except for the above component (B), and by having a total light transmittance of 50-95%. |
