lightfastnesses
/ˈlaɪtˌfæstnəsɪz/
noun
- Plural of lightfastness; multiple instances or types of resistance to light damage.
- The report listed the lightfastnesses of each material after 100 hours of sunlight exposure.
- Different paints have varying lightfastnesses, so check the labels carefully.
- The lab compared the lightfastnesses of several different fabric dyes.
Antonyms