▎ 摘　　要

NOVELTY - Photochromic laser color change material comprises 60-99 pts. wt. matrix polymer, 0.05-10 pts. wt. carbon material, and 1-30 pts. wt. core-shell structure microspheres. The shell material of the core-shell structure microsphere is thermosetting resin. The core of the core-shell structured microsphere is composed of photochromic compound, solvent and light stabilizer. USE - The material is useful in production of anti-counterfeiting marks (claimed). ADVANTAGE - The material can be marked with a laser on the surface of a dark part to obtain a light-colored imprint, which can be changed into a color under visible light and/or ultraviolet light. The method: is simple, and easy to operate; widens the application field of laser marking polymers; is very suitable for large-scale industrial production; and has good economic benefits. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the photochromic laser color change material, comprising uniformly mixing matrix polymer, carbon material and core-shell structure microspheres, melting, extruding, and pelletizing to obtain the product; (2) preparing the anti-counterfeiting marks, comprising irradiating the photochromic laser color change material with a laser, and producing patterns or texts with a lighter color than the original surface; and (3) anti-counterfeiting mark obtained by the above preparation method.