Titanium dioxide is divided into rutile titanium dioxide and anatase titanium dioxide. Titanium dioxide has excellent hiding power and tinting power, and is considered the best quality white pigment so far.
It is mainly used in coatings, inks, papermaking, ceramics, cosmetics, food, medical and other industries. It has a wide range of uses. So when purchasing titanium dioxide, what problems should we pay attention to? The following introduces you to the purchasing skills of titanium dioxide.
Look at the test report
1. TO2% means whiteness, covering power (opacity, tinting strength), the higher the percentage content, the greater the whiteness and hiding power.
2. A2O3% means dispersion, gloss, and weather resistance. After several dense aluminum treatments, the higher the percentage content, the greater the dispersion and light depth.
3. SiO2% means weather resistance (treated with dense silicon), the higher the percentage content, the greater the rain resistance.
4. The organic matter is coated with organic matter, and the dispersibility (moisture) is better.
5. Color means whiteness, luminance (brightness).
6. The average particle size determines the light exposure and plate suitability. The smaller the particle size is, the more blue the titanium dioxide color is.
7. Oil absorption affects the gloss and dispersion of the system.
8. The resistance value indicates the soluble salt content.
Through packaging identification
Titanium dioxide usually has its own characteristics on its packaging (such as patterns, fonts, batch numbers, etc.)
physical detection method
1. The easiest way is to compare the hand feeling, the fake titanium dioxide is more slippery, and the real titanium dioxide is more astringent.
2. Water flushing. Keep some titanium dioxide on hand, the fake ones are easy to wash off, but the real ones are not easy to wash off.
3. Take a cup of clear water and throw titanium dioxide into it. If it floats up, it is true, and if it settles down, it is false.
Titanium Dioxide Purchase Tips
1. Color is an important technical index of the marked material. Titanium dioxide is called “the king of white pigments”. The color index of titanium dioxide is whiteness. Generally speaking, the purer the whiteness, the better the quality.
2. Hiding power means that when an object is coated with a certain kind of paint, the pigment in the paint can cover the background color of the surface of the coated object, so that the background color can no longer be displayed through the paint.The optical nature of the opacity is due to the difference in the refractive index of the pigment and the medium in which its pattern exists. The refractive index of rutile type titanium dioxide is 2.71, and that of anatase type is 2.55, which is the white pigment with the highest hiding power.
3. Oil absorption is also one of the important pigment properties of titanium dioxide, because it involves the filling state of titanium dioxide in the vehicle, and can explain its performance in the medium.
4. The chemical composition of titanium dioxide determines the chemical properties of titanium dioxide, which is the main sign of the difference between pigments.
In addition to reflecting a series of pigment properties of pigments, such as whiteness, decolorization power, oil absorption, etc., it also has a great effect on its application performance, such as weather resistance, dispersibility, etc.
5. The light resistance and weather resistance of titanium dioxide are important indicators to measure the application performance of titanium dioxide. It is meaningful to refer to its light resistance and weather resistance alone. Only when titanium dioxide is applied to related application fields (such as automotive paint, profiles, etc.)this indicator is meaningful.Therefore, the light resistance and weather resistance of titanium dioxide refer to its light resistance and weather resistance in a certain field. In addition, to measure the light resistance and weather resistance of titanium dioxide anti-powder, it is necessary to ensure its application carrier.
6. The glossiness of titanium dioxide is an important index to measure the application performance of titanium dioxide. Usually titanium dioxide has no luster, and it is meaningless to refer to its gloss alone.
This indicator is meaningful only after titanium dioxide is applied to relevant application fields (such as automotive paint, ink, profile, masterbatch, etc.).
Post time: Jul-13-2023