Phototendering

Phototendering is the process by which organic fibres and textiles lose strength and flexibility as a result of exposure to sunlight. It is the ultraviolet component of the sun's spectrum which affects fibres, causing chain degradation and hence loss of strength. Fading of colours is a common problem in phototendering.

UV Degradation

The rate of deterioration is also affected by pigments and dyes present in the textiles. Pigments themselves can also be affected, generally fading after exposure to both UVA and UVB radiation. Great care is needed to preserve museum artefacts from the harmful effects such as ancient textiles, of UV light, which can also be present in fluorescent lamps. Paintings such as watercolours need protection from sunlight so that the original colours are preserved.

Many synthetic polymers are also degraded by UV light with polypropylene especially susceptible. As a result, UV stabilisers are added to many thermoplastics. Carbon black is also effective in protecting products against UV degradation.

Effect of UV exposure on polypropylene rope
gollark: It also seemed like I did have to bind still, or it did slightly more nothing. Maybe the multicast APIs are just particularly accursed somehow.
gollark: > what's convoluted about that? that's IPHow is it IP? The internet is packet-switched, not circuit-switched.
gollark: Also, potato.
gollark: You have to `bind` and `connect` still, and there seem to be separate "receive from" and "send to" things anyway, and there's a special "join_multicast_v6" thing, and with multicast stuff you have to worry about different interfaces and somehow binding to different addresses than the one you actually want to listen on and it returns useless errors and is generally aææææææææææa.
gollark: UDP is not a stream-oriented protocol and yet you have to muck with sockets in convoluted ways.

See also
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