Definition of lightfast in English:

lightfast

adjectiveˈlʌɪtfɑːstˈlaɪtˌfæst

(of a dye or pigment) not prone to discolour when exposed to light.
（染料或颜料见光）不易褪色的
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

lightfastness

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.
（染料或颜料见光）不易褪色的
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?

单词	lightfast
释义	Definition of lightfast in English: lightfast adjectiveˈlʌɪtfɑːstˈlaɪtˌfæst (of a dye or pigment) not prone to discolour when exposed to light. （染料或颜料见光）不易褪色的 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 lightfastness 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. （染料或颜料见光）不易褪色的 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?
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