age coating

age coating

[āj ′kōd·iŋ]
(electricity)
The black deposit that is formed on the inner surface of an electric lamp by material evaporated from the filament.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
This latter setup was used to age coatings in conditions simulating those that FCCs typically encounter during voyages.