10 января, 2016 
Pokraskin Like the particle size, the particle shape also has a significant influence on the optical effect: the smoother the surface, the better (and more parallel) is the reflection and the rounder and more regular the particle, the lower the amount of scattering. This means, comparing “cornflake-types” and “silverdollar-types” of aluminum pigments with similar particle size distribution in the same formulation, the round “silver dollars” show much more lightness and brightness and a much smoother effect (“silky”).
Even more extremely, one can realize the influence of the smoothness of the pigment surface, if one looks at applications with vacuum metallized aluminum pigments manufactured from vacuum metallized films. These pigments have a foil — or mirror-like surface, achieving extra brilliant and high gloss effects. They are therefore
preferred for use in reflective coatings, high brilliant decorative coatings and printing inks (as a substitute for hotstamping foils).
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