Brightness and lightness

These properties are extremely important for application fields such as paper or paint, but also for all applications where the stability of colour properties is expected.

• lightness is measured at 520 nm; it is Y of the chromacity in the space Yxy.
• brightness is measured at 457 nm; in the same space Yxy, it is the result of :

          or a similar relation in the space Lab)

Particle diameter | Size of agglomerates | Volatile components | Organic coating content | Yield stress and viscosity