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Color and Its Effects on Coating Performance: The Value of Clear Coats

To determine how colors change during weathering, ten non-leaded polyurethane colors were exposed to QUV accelerated weathering, Chicago outdoor exposure and Florida outdoor exposure. Color change, percent gloss retention and Aesthetic Ratings were made every 1000 hours in QUV up to 8000 hours, yearly in Chicago exposure for four years and yearly in Florida exposure for three years. 

Product Number: 41208-418-SG
Author: Gary W. Gardner
Publication Date: 2008
Industry: Coatings
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To determine how colors change during weathering, ten non-leaded polyurethane colors were exposed to QUV accelerated weathering, Chicago outdoor exposure and Florida outdoor exposure. Color change, percent gloss retention and Aesthetic Ratings were made every 1000 hours in QUV up to 8000 hours, yearly in Chicago exposure for four years and yearly in Florida exposure for three years. Dramatic changes in Aesthetic Ratings revealed that some colors maintain aesthetics much longer than other colors. The same ten colors were also exposed with a clear coat topcoat. Using a clear coat improved aesthetic performance significantly and greatly reduced the differences in Aesthetic Ratings between the various colors.

To determine how colors change during weathering, ten non-leaded polyurethane colors were exposed to QUV accelerated weathering, Chicago outdoor exposure and Florida outdoor exposure. Color change, percent gloss retention and Aesthetic Ratings were made every 1000 hours in QUV up to 8000 hours, yearly in Chicago exposure for four years and yearly in Florida exposure for three years. Dramatic changes in Aesthetic Ratings revealed that some colors maintain aesthetics much longer than other colors. The same ten colors were also exposed with a clear coat topcoat. Using a clear coat improved aesthetic performance significantly and greatly reduced the differences in Aesthetic Ratings between the various colors.

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