Titanium Dioxide is Incomparable with Other White Pigments in Ink
The status of titanium dioxide in ink is irreplaceable, because titanium dioxide is far superior to other white pigments in several main properties that determine the quality of ink. Such as refractive index, achromatic power, hiding power and oil absorption.
Under the same conditions, the refractive index of rutile titanium dioxide is 2.76, the refractive index of anatase titanium dioxide is 2.55, the refractive index of zinc sulfide is 2.37, the refractive index of zinc barium white is 1.84, and the refractive index of lead white is 2.00; On the one hand, titanium dioxide also shows better performance than other white pigments.
The relative achromatic power of rutile titanium dioxide is 100, the relative value of anatase titanium dioxide is 77, the relative value of zinc sulfide is 40, the relative value of zinc barium white is 16, and the relative value of lead white is 16. The relative value of chromatic power is 9; in terms of hiding power, the advantages of titanium dioxide make it difficult for other white pigments to match.
The relative hiding power of rutile titanium dioxide is 100, the relative hiding power of anatase titanium dioxide is 78, the relative hiding power of zinc sulfide is 39, the relative hiding power of zinc barium white is 18, and the relative hiding power of lead white is 12.
Judging 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, and the oil absorption of zinc barium white The oil absorption is 14-16 grams, and the oil absorption of lead white is 8-15 grams. It can be seen that the oil absorption of titanium dioxide is also the best.
In the finished ink, 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 other white pigments are difficult to achieve. Therefore, titanium dioxide is more suitable as an ink additive than other white pigments.
