Can a process refractometer measure kaolin (“china clay”) in water?
No, because kaolin clay is chemically inert and doesn’t dissolve in water, thus there’s no concentration, just particles in water. Can a process refractometer measure Titanium Dioxide (TiO2) in water? No. Distinct from dyestuffs which operate on a molecular level, pigments (TiO2 among them) tend to be particulate and insoluble and thus there’s no liquid concentration for the refractometer to measure.
