How is ink manufactured?

All inks contain two rudimentary components: a pigment or dye called a colourant, and a vehicle which is the liquid into which the colourant is dispersed. Printing inks are more like paints than writing inks — they consist of solid pigments dispersed in an oil. They are, therefore, less fluid. Manufacturing ink is a complicated process, involving the mixture of a pigment with a vehicle, the grinding of the mixture in a mill between rollers, the addition of driers, and, when using chemicallyproduced rather than natural pigments, a filtering process.