| 摘要 |
Polyamide porous spherical particles having a number-average particle diameter of 2 to 30 µm, a BET specific surface area of 100 to 80,000 m 2 /kg, and a ratio of a volume-average particle diameter to the number-average particle diameter in the range of 1.52 to 2.50 is reduced in luminous reflectance. |
