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Reference: Grossman, D.M., “Errors Caused by Using Joules to Time Laboratory and Outdoor Expo - sure Tests”, Accelerated and Outdoor Durability Testing of Organic Materials, ASTM STP 1202, Warren D. Ketola, and Douglas Grossman, Eds., American Societ...

General ASTM G151 - Standard Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources ASTM G154 - Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Non-Metallic M...

Limitation in the State of the ArtLightfastness and weatherability are necessary qualities for many materials used in the automotive in - dustry. Because outdoor exposures are time consuming and the weather is variable from year to year and place to ...

The Need For Testing Light, high temperature, and moisture can cause damage to coatings, plastics, inks, and other organic materials. The resulting damage can be seen in many different types of polymer degradation. These include changes in physi...

Many materials are exposed not to direct sunlight, but to sunlight filtered through glass. Several examples of these are window blinds and interior textiles, caulking compounds used on the inside of windows, automotive interiors, and materials coated...

Weathering is an important cause of damage to plastics, textiles, coatings, and other organic materials. Accelerated weathering testers are used to simulate this damage for research and development, quality control, and material certification. Two wi...

Weathering is an important cause of damage to plastics, textiles, coatings, and other organic materials. Accelerated weathering testers are used to simulate this damage for research and development, quality control, and material certification. Two po...

A new UV-A light source for fluorescent testers improves correlations with actual outdoor testing - although at the expense of some test speed. Its increased accuracy should offset the time penalty for many applications, including both outdoor and be...

Q. How many hours in a Q-Sun Xenon Test Chamber or a QUV Weathering Tester equals a year of outdoor exposure?This is a simple question, but unfortunately there is no simple answer. It is theoretically impossible to have a single magic number that you...

Sunlight, Weathering & Light Stability TestingSunlight is a major cause of damage to a number of materials, including plastics, textiles, coatings, and other organic materials. The type of damage, such as loss of physical properties, chalking, cr...