Photo tendering

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Photo tendering (degradation by light) is the process by which organic fibers and textiles lose strength and flexibility when exposed to sunlight.

The ultraviolet component of the solar spectrum affects the fibers and causes chain breakdown and thus loss of strength. The deterioration rate is influenced by pigments and dyes in the textiles. Pigments themselves can be affected, generally fading after exposure. Great care is required to protect museum artifacts from the harmful effects of UV light that can be present in fluorescent lighting . Many synthetic polymers are broken down by UV light, and UV stabilizers are added to many thermoplastics.

The word is derived from ancient Greek φῶς, phōs = light and English tendering <textil> = weakening.

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Individual evidence

  1. Gerald J Smith, Ian J Miller, Vincent Daniels, Phototendering of wool sensitized by naturally occurring polyphenolic dyes, Journal of Photochemistry and Photobiology A: Chemistry, 2005, 169, 2, 147
  2. Allen, NS, JF McKellar, and S. Protopapas 1977. Lightfastness, phototendering and fluorescence of 3-methoxybenzanthrone. Journal of Applied Chemistry and Biotechnology 27: 269-73.
  3. Kuramoto, N. The photodegradation of synthetic colorants. In: PETERS, AT; FREEMAN, HS Physico-chemical Principles of Color Chemistry. London: Blackie Academic and Professional Publishers, 1996, p. 196-253.
  4. Bilz, M., and DW Grattan. 1996. The development of an apparatus for studying the effect of light exposure on museum materials. In 11th Triennial Meeting, Edinburgh, Scotland, September 1-6, 1996: ICOM Committee for Conservation Preprints. Vol. 2, 559-65. London: James & James
  5. ^ Technical dictionary technology and applied sciences English-German , 2nd edition, Langenscheidt, Berlin-Munich-Vienna-Zurich-New York, 2004, ISBN 3-86117-227-5 , p. 1981