lightfast

/ˈlaɪtˌfæst/
adjective
  1. Resistant to fading or damage when exposed to light, especially sunlight.
    • When buying outdoor furniture, look for lightfast fabrics that won't fade in the sun.
    • These lightfast markers are perfect for artwork that will be displayed near a window.
    • The museum uses only lightfast pigments in its restoration projects.
Synonyms
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