This document is a thorough representation of the terms associated with color and appearance in the application of decorative glass products. Definitions and examples are provided for over 35 terms. This document was originally published in 2008, republished in 2013 and updated in July 2019.

The Technical Services Division of the National Glass Association (NGA) has produced this Glass Technical Paper solely for informational purposes. This Paper was developed by dedicated member volunteers and subject matter experts.  All purchases will be electronically accessed or delivered.