noun see lightfast

New Collegiate Dictionary. 2001.

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  • lightfastness — noun ( es) : ability to resist change by light and especially by sunlight; specifically : resistance to fading or change of color by light violet shades of outstanding lightfastness testing dyed materials for lightfastness …   Useful english dictionary

  • Lightfastness — Светостойкость …   Краткий толковый словарь по полиграфии

  • lightfastness — light·fast·ness …   English syllables

  • lightfast — lightfastness, n. /luyt fast , fahst /, adj. not affected or faded by light, esp. sunlight; colorfast when exposed to light. [1955 60; LIGHT1 + FAST1] * * * …   Universalium

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  • Azo compound — General chemical formula of azo compounds Azo compounds are compounds bearing the functional group R N=N R , in which R and R can be either aryl or alkyl. IUPAC defines azo compounds as: Derivatives of diazene (diimide), HN=NH, wherein both… …   Wikipedia

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