How to identify true and false 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。
The simplest way is to compare the hand feeling. The fake titanium dioxide is slippery, and the real titanium dioxide is astringent.
2、水冲，手上沾点钛白粉，假钛白粉容易冲掉，真钛白粉不容易冲掉。
Water washing: a little titanium dioxide on your hand. False titanium dioxide is easy to wash off, but real titanium dioxide is not easy to wash off.
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）。
Take a glass of clean water and throw titanium dioxide into it. If it floats up, it is true, and if it settles down, it is false (if it is an activated product, it will not work).
4、掺了轻钙或重钙：加入稀硫酸或盐酸，有气泡可以使澄清石灰水变浑浊，因为碳酸钙会与酸反应产生二氧化碳。
Mixing light or heavy calcium: Adding dilute sulfuric acid or hydrochloric acid can cause clear lime water to become turbid due to the reaction of calcium carbonate with acid to produce carbon dioxide.
5、做成乳胶漆，加铁红，颜色深，说明遮盖力差的为假或质量很差的钛白粉。
It is made into emulsion paint with iron red and dark color, indicating that the poor hiding power is false or titanium dioxide with poor quality.
