Subject:
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Re: Yellowing of white bricks/plates
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Newsgroups:
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lugnet.build
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Date:
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Wed, 27 Feb 2002 17:52:53 GMT
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Viewed:
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792 times
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I'm just learning this stuff, so don't quote me. The plastic is damaged by
light at the more energetic end of the spectrum: ultraviolet. After time, it
reflects less of the visible light at that end of the spectrum: white
plastic starts to absorb blue light (which has higher energy than say, red
or infrared). Now think of subtractive color, and you can predict that the
white color will start to turn yellow.
I've noticed that blue bricks fade rather attractively.
Plastic compounders add a UV resisting agent to the plastic. New UV blockers
go on the market often. So potentially, the properties could change.
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Message is in Reply To:
 | | Re: Yellowing of white bricks/plates
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| (...) I would guess that sun/UV damage is cumulative. Possibly the reason that adjacent pieces don't fade equally is that some of them have had more previous exposure than others. Another possibility, as you mention, is manufacturing variances. The (...) (23 years ago, 27-Feb-02, to lugnet.build)
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