物理方法鉴别钛白粉的质量：
Physical methods to identify the quality of titanium dioxide:
1.最简单的方法是比较手感，假钛白粉较滑，真钛白粉较涩；
1. The simplest way is to feel better. The pseudotitanium dioxide is slippery and the true titanium dioxide is astringent.
2.水冲，手上沾点钛白粉，假的容易冲掉，真的不容易冲掉；
2. Water flushing, hands stained with titanium dioxide, false easy to flush, really not easy to flush;
3.取一杯清水，丢钛白粉进去；浮上来的为真，沉淀下去的为假(如果是活化改性的产品就不灵了）。
3. Take a glass of water and throw in titanium dioxide; float up is true, precipitate down is false (if it is the product of activation modification, it will not work).