Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The quality of being lightfast.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

lightfast +‎ -ness

Examples

  • Today we continue a six-part series on lightfastness, which is the resistance of various pigments and media to fading as a result of exposure to light.

    Archive 2010-04-01

  • Another concern is the "lightfastness" of organic dyestuffs-some colors (reds and blues) are particularly prone to fading.

    CR4 - Recent Forum Threads and Blog Entries

  • How long your prints will look good is called lightfastness, and it's a selling point for some printers (like, for example, the

    PC World

  • Crimson/PR 83 they give the "ASTM lightfastness rating: N/L" BUT according to their "Composition and Permanence Terms Explained" section, this doesn't stand for "Not Lightfast," it stands for "Not Listed".

    Lightfastness and Alizarin Crimson

  • James - I've got a LOT of information about the lightfastness standard for coloured pencils and the lightfastness of different brands of coloured pencils on my information site Coloured Pencils - Resources for Artists.

    Lightfastness in Pencils, Watercolors, and Oils

  • Industry labeling practice is to include a lightfastness rating on the paint packaging, and painters should only use paints that have a lightfastness rating of I or II under the testing standards published the American Society of Testing and Materials now ASTM International.

    Lightfastness in Pencils, Watercolors, and Oils

  • I was always curious why colors like Alizarin Crimson have such a high lightfastness my gouache of Aliz. crimson and Spectrum violet are IV and V respectively Although my Acrylic version is a Liquixtex Alizarin Crimson Hue Permanent which has a lightfastness of I because it's made of Quinacridone, and the pigment's pretty much the same.

    Lightfastness and Alizarin Crimson

  • Unfortunately, paint manufacturer lightfastness ratings are not always trustworthy.

    Lightfastness in Pencils, Watercolors, and Oils

  • While still waiting for that wash to dry, I was mildly surprised by parts of what Wikipedia has to say about lightfastness:

    Lightfastness in Pencils, Watercolors, and Oils

  • Ever since I've always advocated finding out about the lightfastness ratings because coloured pencils used to be used by illustrators who of course had no concerns about how long a drawing would last!

    Lightfastness in Pencils, Watercolors, and Oils

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