How is white pigment made?

Because of its particularity, white can't be adjusted by pigment.

Red pigment plus blue pigment plus red pigment can absorb all the light, so it becomes black. So as long as it is not white pigment, it will absorb light of other colors, so according to this theory, white cannot be mixed with pigment.

Pigments can be classified according to the types of compounds: inorganic pigments can be subdivided into oxide, chromate, sulfate, silicate, borate, molybdate, phosphate, vanadate, ferricyanide, hydroxide, sulfide, metal and so on. According to the chemical structure of compounds, organic pigments can be divided into azo pigments, phthalocyanine pigments, anthraquinone, indigo, quinacridone, dioxazine and other polycyclic pigments, aryl methane pigments and so on.