An improved method is provided for applying a dark dielectric surface to a white substrate as used in headers for light emitting diode displays. Light reflectance is reduced without degrading the insulating properties of the dielectric. A paste comprising fine grain alumina and up to 20% by weight of...http://www.google.com/patents/US3955023?utm_source=gb-gplus-sharePatent US3955023 - Black dielectric mask on white substrate
