| 摘要 |
The invention comprises particulate titanium dioxide with an average particle size of 0.005 to 0.15 micrometre and having a coating of zinc oxide or hydrous zinc oxide in an amount of at least 100 weight per cent with respect to TiO2. The product is substantially transparent to visible light and substantially absorbent to ultraviolet light. It can be used in products such as sunscreens in which it provides balanced protection against UVA and UVB light. |
