Subject:
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Re: why parts yellow (was Re: Sopwith Camel pictures)
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Newsgroups:
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lugnet.general
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Date:
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Wed, 30 May 2001 21:00:48 GMT
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Viewed:
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2479 times
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In lugnet.general, Tony Priestman writes:
> A prime suspect must be decomposition by free radical attack. Exposure
> to light will accelerate this, and putting the bricks in the dark
> afterwards will not slow it down again, if there is nothing in the
> plastic to scavenge the radicals & stop the reactions. The different
> amount of yellowing in different coloured bricks can be explained if
> dyes of different colours have different levels of effectiveness as free
> radical traps. It could also just be some of the dyes mask the yellowing
> better :-)
I don't know nuthin bout no free radicals, but my grandfather has had
white vinyl siding on his house for about fifteen years, and its still a lot
whiter than my white LEGO bricks purchased at about the same time (and which
have spent a lot less time in the direct sun than his house). I know the
material itself is different (though it would be cool to have a house with
LEGO siding), but isn't there some way to marry the benefits of the two
plastics? 8^)
Dave!
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Message has 1 Reply:
 | | Re: why parts yellow (was Re: Sopwith Camel pictures)
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| On Wed, 30 May 2001, Dave Schuler (<GE62DC.J0D@lugnet.com>) wrote at 21:00:48 (...) uPVC for outdoor use in windows, etc. is absolutely brimming with the stuff that stops it going yellow & decomposing. Because LEGO isn't designed for outdoor use, it (...) (23 years ago, 30-May-01, to lugnet.general)
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Message is in Reply To:
| | Re: why parts yellow (was Re: Sopwith Camel pictures)
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| On Wed, 30 May 2001, Cary Clark (<GE5u0s.MLF@lugnet.com>) wrote at 18:00:14 (...) It is distinctly possible that there is more than one cause of yellowing, as there appears to be more than type of yellowing. Having said that, the following (...) (23 years ago, 30-May-01, to lugnet.general)
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