Pearlescent Pigments

Pearlescent Pigments - A class of pigments consisting of particles that are essentially transparent crystals of a high refractive index. The optical effect is one on partial reflection from the two sides of each flake. When reflections from parallel plates reinforce each other, the result is a silvery luster, iridescent effects and metallic sheen resembling natural pearl.

Linear molecule

Linear molecule - A long chain molecule of two-dimensional structure which may contain side chains or branches.

Polymer crystallinity

Crystallinity - A state of molecular orientation which denotes an orderly compact structure of the molecular chains forming the polymer.