The durability of a decorative glass product is a complex characteristic. Durability must be considered in context, against what factors the product must be durable. Sunlight, rain, cleaning solutions, abrasion, heat and other factors can work alone or in combination to adversely affect glass products. Test methods to measure and report a product's resistances to such factors are important to communicate durability performance requirements and specifications. This document offers a profile of a number of important durability properties. For each property, an overview discusses each factor in some technical detail, examples are given where a glass product might encounter such a factor, and one or more test methods are suggested that can measure durability of a material or product against that factor. Where it was not possible to identify test methods specific to glass, methods for other materials, such as ceramics or plastics, are listed. This document was originally published in 2014 and updated in July 2019.