Micro-text & Covert Anti-counterfeit Coining
微文字与隐藏防伪精压
标签：微文字, 防伪, 电铸镍, 激光雕刻, 暗记, 纪念章
近年纪念章防伪向「微文字+隐藏暗记」发展：0.08–0.12 mm 级微文字阳模用电铸镍模衬或激光雕刻模具复现，压入深度 5–10 μm，肉眼近似细线、放大镜下可读。隐藏暗记可用 0.05 mm 起伏差在特定光角下显形。模具寿命关键在模衬硬度与压印力匹配：镍衬限用于 ≤100 吨的小规格章。
Recent medals use micro-text plus covert marks: 0.08–0.12 mm micro-letters are reproduced by electroformed nickel die inserts or laser-engraved dies, struck 5–10 μm deep — invisible as a line to the eye, legible under a loupe. Hidden marks use 0.05 mm height steps that appear at one viewing angle. Keep nickel inserts to medals under 100 tons or die life suffers. ---