抄録
Urushi (Japanese lacquer) products are fabricated by craftsmen who are extremely skilled at painting Urushi on wooden basis. These products give us high quality sensitivity, therefore, in the plastic industry the analysis of the secret of Urushi products is an important proposition in order to create high quality plastic products. In this report, gloss value, lightness, chromaticness and chromaticity were measured for both Urushi products and sandwich injection moldings in which PC, PC/ABS and ABS resin were used for core and PC resin was used for skin. As results, PC skin and PC core with black pigment product indicated very close values to Urushi product in terms of gloss value, lightness, chromaticness and chromaticity. Additionally, when PC was used for the core, the chromaticity of a* indicated larges values than other moldings, and this means that the change of color to red was large. The superior sensitivity in Urushi products arose from the change of color chromaticity to red, and consequently, the moldings with PC core were close to Urushi products.
