Definition of lightfast in English:
lightfast
adjectiveˈlʌɪtfɑːstˈlaɪtˌfæst
(of a dye or pigment) not prone to discolour when exposed to light.
colour it with a lightfast paint
Example sentencesExamples
- Need the right expert in lightfast dye?
- The Bisphenol A bischloroformate is then reacted with another chemical to produce a lightfast epoxy resin.
- I was wondering if anyone knows whether its nupastels are lightfast or not.
Derivatives
noun
Earth colors are rated ASTM Lightfastness I - the highest lightfastness rating.
Example sentencesExamples
- If a pigment has good lightfastness, it does not always mean that it has good weatherfastness
- When you've painted all the colors you want to test for lightfastness, cut the sheet in half.
- Label the swatches carefully, and expose to direct sunlight or a commercial lamp of the type used for testing lightfastness.
- This pigment identification project and a lightfastness standard can only lead to the increased recognition of this fine art medium.
Definition of lightfast in US English:
lightfast
adjectiveˈlaɪtˌfæstˈlītˌfast
(of a dye or pigment) not prone to discolor when exposed to light.
color it with a lightfast paint
Example sentencesExamples
- I was wondering if anyone knows whether its nupastels are lightfast or not.
- The Bisphenol A bischloroformate is then reacted with another chemical to produce a lightfast epoxy resin.
- Need the right expert in lightfast dye?