| 摘要 |
PURPOSE:To provide a marking composition which can develop a color in clear white by irradiation with a laser beam. CONSTITUTION:A marking composition containing at least one component selected from a thermoplastic resin, talc of 1-300wt.% of the resin, calcium carbonate, alumina, clay, magnesium oxide, and magnesium hydroxide, and a molded product or a film made of the composition. |
