The relationship between oil absorption and dispersion of isodisperse pigment

The oil absorption capacity of the pigment depends on its liquid absorption capacity Some pigments (such as iron red) are enclosed by the shell of the adsorbed liquid Each particle does not contact with each other directly, but the shell of the adsorbed liquid contacts with each other These shells are full of gaps between spikelets, and they can't put fine grains between coarse grains The oil absorption of the mixture of such heterogeneous pigments can be calculated according to the oil absorption and content of the individual components of the mixed pigments Some pigment particles are not The shell with adsorption liquid rest, between the coarse and fine particles, when the particle size difference is large, the fine particles should be inserted between the coarse particles Such pigments as chrome oxide and ultramarine have a mixed color The oil absorption of the material is not related to the addition, nor can it be calculated The oil absorption of pigment is the same as that of dispersion It is closely related, and the staff is not determined by dispersion alone When the water content of synthetic pigment reaches a certain level, the oil absorption will decrease with the increase of water content