| abstract |
These biodegradable resin particles are made of polyhydroxyalkanoates, wherein the amount of a Ca component contained in the particles is 10-10,000 ppm, and the resin particles have a volume average particle diameter of 2-50 μm, a BET specific surface area of 0.8-10 m2/g, and a linseed oil-absorbing amount of 50-300 ml/100 g. Resin particles of the present invention can be suitably used by being mixed with an external preparation such as cosmetics and a quasi-drug. |