Subject:
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Re: LEGO Quality
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Newsgroups:
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lugnet.general
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Date:
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Sat, 3 Mar 2001 04:09:01 GMT
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Viewed:
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498 times
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"Micah J. Mabelitini" wrote:
>
> Frank Filz wrote:
>
> <snip>
>
> > In addition to this, the blue 2x4 bricks in 664 were yellowed (so much
> > for sunlight being the cause or at least the only cause of brick
> > yellowing, at least of blue bricks).
> >
> > I wonder if the the packaging (box or plastic bags) has any detrimental
> > effects.
>
> It's doubtful the packaging had any effect at all on the yellowing. All
> ABS LEGO bricks, white or otherwise colored, should yellow eventually,
> simply because of the heat-molding process used to make them. That
> initial heating process obliterates a certain amount of hydrogen atoms
> in the ABS, leaving open carbon bonds exposed on the surface to attract
> whatever sort of atoms happen to be floating by. UV exposure from
> sunlight merely accelerates an inevitable process. Unless they started
> sealing LEGO in airtight argon-filled polybags, and packaged them in
> UV-blocking boxes, the parts would still yellow, in the box or otherwise.
Although an interesting question is why the 2x4 bricks and only the 2x4
bricks are yellowed. Also, I've got plenty of old bricks which are not
yellowed, so there definitely are differing effects. One factor in the
yellowed 2x4 bricks situation is that they weren't in a poly bag,
perhaps the polybag protected the other bricks somehow (can't recall if
it was the airtight type or the open type). There's also a sticker sheet
loose in the box, so perhaps the yellowing was caused by chemicals
leaching from the sticker sheet.
Frank
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Message is in Reply To:
 | | Re: LEGO Quality
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| Frank Filz wrote: <snip> (...) It's doubtful the packaging had any effect at all on the yellowing. All ABS LEGO bricks, white or otherwise colored, should yellow eventually, simply because of the heat-molding process used to make them. That initial (...) (23 years ago, 3-Mar-01, to lugnet.general)
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