lightfastness
/ˈlaɪtˌfæstnəs/
noun
- The quality or degree of being resistant to fading or damage from light exposure.
- The lightfastness of this ink is rated as excellent, so it's ideal for archival documents.
- Manufacturers test the lightfastness of their dyes to ensure long-lasting colors.
- Artists often check the lightfastness rating of paints before buying them.
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