| 摘要 |
<p>A colored resin powder for resinous facing crown retainers is obtained by coloring a combustible, spherical or amorphous resin powder having a particle size of 30 to 800 mu m with a water-soluble dye. Preferably a coloured resin powder for resinous facing crown retainers, is obtained by coloring 0.1 to 100 parts by weight of a resin powder with 0.001 to 10 parts by weight of a water-soluble dye in 100 parts by weight of water.</p> |
