Optical density
Characteristic value for specification of the light density of coloured or metallized films as well as other light-tight materials by densitometer instrument Gretag McBeth.
In short — AI-generated
The optical density test measures the light-blocking capability of colored, metallized, or opaque films. Using a Gretag McBeth densitometer, the device quantifies how much light is transmitted through the material to determine its light-tightness.
The resulting numerical value indicates the opacity or the thickness of a metallized layer. This value is used in practice to ensure consistent barrier properties and to verify that packaging provides the required light protection for the contents.
Text is AI-generated; based on test method data curated and verified by Innoform.