The role of titanium dioxide in ink is incomparable with other white pigments
The status of titanium dioxide in the ink is irreplaceable, because titanium dioxide is far superior to other white pigments in determining the quality of the ink. Such as refractive index, achromatic power, hiding power and oil absorption.
Under the same conditions, the refractive index of rutile titanium dioxide was 2.76, the refractive index of anatase titanium dioxide was 2.55, the refractive index of zinc sulfide was 2.37, the refractive index of zinc barium white was 1.84, and the refractive index of lead white was 2.00. In terms of achromatic power, titanium dioxide also shows better performance than other white pigments.
The relative value of rutile titanium dioxide achromatic power was 100, the relative value of anatase titanium dioxide achromatic power was 77, the relative value of zinc sulfide achromatic power was 40, the relative value of zinc barium dioxide, the relative value of zinc barium dioxide, and the relative value of lead white blasting power was 9. In terms of hiding power, the advantages of titanium dioxide make it difficult to match other white pigments.
The relative value of rutile titanium dioxide hiding power is 100, the relative value of anatase titanium dioxide hiding power is 78, the relative value of zinc sulfide hiding force is 39, the relative value of zinc barium white hiding force is 18, and the relative value of lead white folding hiding force is 12.
From the oil absorption per 100 grams of white pigment, the oil absorption of rutile titanium dioxide is 25 grams, the oil absorption of anatase titanium dioxide is 30 grams, the oil absorption of zinc sulfide is 15-25 grams, the oil absorption of zinc barium white is 14-16 grams, and the oil absorption of lead white is 8-15 grams, which shows that the oil absorption of titanium dioxide is also the best.
In the finished ink product, the four key properties of refractive index, achromatic power, hiding power and oil absorption support the quality of the ink, and titanium dioxide has the refractive index, achromatic power, hiding power and oil absorption that are difficult to achieve by other white pigments, so titanium dioxide as an ink additive is more suitable than other white pigments.