Choosing Mould Material
制模材料选型
标签：制模材料,硅胶,石膏,失蜡,耐高温
柔性纹理（浅浮雕、曲面）首选 RTV 加成型硅胶，脱模性好、可翻复数十次；刚性深浮雕或大件用石膏或失蜡；高温浇铸金属须用耐高温的石膏/陶瓷壳，普通硅胶会烧蚀。选材料时还要考虑原样是否怕溶剂（某些清漆会被硅胶催化剂腐蚀）。
For flexible, shallow or curved reliefs choose addition-cure RTV silicone—good release, dozens of pulls. Rigid deep reliefs or large parts use plaster or lost-wax; high-temperature metal casting needs heat-resistant plaster/ceramic shell since ordinary silicone burns. Also check if the original tolerates solvents (some lacquers are attacked by silicone catalyst). ---