My pigmented coating containing aluminium pigments appears grey. What could be the cause of this?
There are two possible explanations for this effect: • The choice of pigments may be unsuitable for the required use, i.e. the selected type has too high a proportion of fine particles. • The fine particles in the aluminium pigment are created as a result of high shear forces during dispersion (pearl mill). In order to prevent this effect, high shear forces should be avoided in general.
