Abstract
A method for replicating snow crystals using a light-curing resin was proposed and the 3D reproduction of a snow crystal by stereolithography was conducted. It was found that a UV light irradiation density greater than 0.2 mW/cm^2 was required to complete the light-hardening reaction within 15 min when polyene/polythiol resin (NOA81) was used as the light-curing resin, and the temperature rise of NOA81 at 0.2 mW/cm^2 was 5 ℃. This means that the initial temperature of NOA81 should be -5 ℃ or lower when the replication is performed under these conditions.
