lightfast

English

WOTD – 4 September 2011

Etymology

light +‎ fast. Compare Icelandic litfast (“colourfast”).

Pronunciation

• (US) IPA^(key): /ˈlaɪtfæst/

  • Audio (Southern England):

    (file)

• Hyphenation: light‧fast

Adjective

lightfast (comparative more lightfast, superlative most lightfast)

1. Resistant to fading.

   Verdigris is lightfast in oil paint, as numerous examples of fifteenth-century paintings show.

   • 2004, Peter K. Burian, Masteringdigital Photography and Imaging‎^[1], page 75:

     Some ink-and-paper combinations are more lightfast than others, and the resulting prints are more fade-resistant.

   • 2009, Anthony Covington, Tony Covington, Tanning Chemistry: The Science of Leather‎^[2], page 286:

     Tara, a gallotannin, is often quoted as being the most lightfast vegetable tannin and makes very pale coloured leather.

   • 2010, Sherry Stone Clifton, Anita Marie Giddings, Pastels For Dummies‎^[3], unnumbered page:

     The blue, or cyan, is the most lightfast ink used in the printing process, so it lasts the longest. That blue, incidentally, is the phthalocyanine blue pigment.
     You can easily test to determine whether any material is lightfast.

Synonyms

• (resistant to fading): nonfading, unfadeable, colorfast

Hypernyms

• sunfast

Derived terms

• lightfastness

Translations

resistant to fading

• Finnish: valonkestävä
• German: lichtecht
• Russian: светостойкий (ru) (svetostojkij), светопрочный (ru) (svetopročnyj)
• Spanish: no desteñible
• Ukrainian: світлостійки́й (svitlostijkýj)
• Vietnamese: bền (vi)