Jun 01, 2016· The difficulty in iron oxides lies in the shape and not the wetting of the pigment. Iron oxide yellow tends to give dilatant rheology, which can be a disaster when automatically dosing in a dispensing machine. On the other hand, iron oxide red tends to increase in viscosity over time in pigment concentrates.
Cathay Industries was founded in 1979, and quickly developed a strong reputation as the iron oxide pigment experts. The incredible demand for iron oxides of varying purity, used for industries from construction to coatings, plastics to pet food, and cosmetics to pharmaceutical colouring, made it apparent that no one supplier was yet able to provide the complete range needed in many industries.