Barium sulfate

Sachtleben TiO2

Sulfuric acid method

of anatase titanium dioxide


Due to their orderly molecular arrangement, chemical fibers have a certain degree of transparency and a smooth surface. When exposed to light, the reflected light is very strong, which can produce aurora and make the fibers have a strong luster that is unpleasant to the naked eye.

Titanium dioxide is considered the ideal extinction material for chemical fibers because of its special optical and physical properties among all white pigments. As an extinction agent, it has been widely used in producing chemical fibers.

Although the refractive index of rutile titanium dioxide is higher than that of anatase, the particles of rutile type are harder and more likely to wear out the spinneret holes and cutting blades, so anatase-type titanium dioxide is generally selected as the extinction agent in chemical fibers.

Refractive index of white pigment and chemical fiber
White PigmentRefractive IndexChemical FiberRefractive Index
Barium sulfate1.64Acetate fiber1.37
Zinc oxide2Viscose fiber1.546
Antimony oxide2.19Ketone-amide fiber1.572
Zinc sulfide2.37PA-61.558
Zinc barium white2PA-661.558

Titanium dioxide (rutile)


Titanium dioxide (anatase)