Construct · 2 fields · 2 citations

Where does tanning collide?

One name. Different field. Different construct. One map.

● jingle · one word, two constructs Nearest construct by meaning·not indexed
tanning2 CONSTRUCTSSun tanningUV · MELANINLeather tanningHIDE → LEATHER

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2008Sun tanning2009Leather tanning
2026

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Skin physiology

Skin darkens as melanin rises after UV

In skin physiology, tanning is the darkening of skin that follows ultraviolet exposure, as melanocytes step up melanin synthesis and transfer the pigment to surrounding keratinocytes, shielding cell nuclei from further UV damage. Brenner and Hearing's 2008 The protective role of melanin against UV damage in human skin sets out this melanogenic response and its photoprotective function. The referent is an adaptive pigmentation process in living skin, measured by melanin content and colour change, and although the word was borrowed from leather it names a wholly different thing from converting a dead hide.[1]

Unit
The increase in skin melanin and darkening after UV exposure
Recovery means
A tan fades as pigmented keratinocytes are shed and melanin production returns to baseline
Measured by
Quantified by melanin index or reflectance colourimetry before and after controlled UV dosing

Leather manufacture

Stabilise raw hide into rot-resistant leather

In leather manufacture, tanning is the conversion of a perishable raw hide into stable leather by introducing tanning agents, namely plant polyphenols (vegetable tannins), chromium salts, or aldehydes, that cross-link the collagen so it resists putrefaction, heat, and water and keeps a flexible structure. Covington's Tanning chemistry: The science of leather is the standard account of how these different tannages bind to collagen and set the hydrothermal stability of the leather. The referent is the chemical stabilisation of a hide, measured by shrinkage temperature and tan uptake, and it is the original meaning from which sun tanning borrowed only the name.[2]

Unit
The tan uptake and the shrinkage (denaturation) temperature of the leather
Recovery means
Not applicable
Measured by
Assessed by shrinkage temperature, degree of cross-linking, and tanning-agent uptake in the hide

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Nearby collisions

currying1 fields · 2 citationsanchor · a standalone construct

References

  1. Brenner, M., & Hearing, V. J. (2008). The protective role of melanin against UV damage in human skin. Photochemistry and Photobiology, 84(3), 539–549. https://doi.org/10.1111/j.1751-1097.2007.00226.x
  2. Covington, A. D. (2009). Tanning chemistry: The science of leather. Royal Society of Chemistry. ISBN 9780854041701

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