  
| Author: | SylvainLS  | | Posted: | Nov 7, 2021 15:19 | | Subject: | Re: Yellowing of bricks | | Viewed: | 53 times | | Topic: | LEGO products | |
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| In LEGO, ryanaitch writes:
| | In LEGO, amvdamian writes:
| | Why do some bricks (belonging to the same set, from the same bag) turn yellow
and others don't?
I recently bought an old SW set from ebay (#9500). It looks like the box was
damaged from improper storage but the bags were intact. This is an old set and
I was actually expecting everything to be somewhat yellowed.
When I opened the bags, some bricks of the same shape and color were "yellowed"
but others weren't! Given that it was a starship, it almost looks as if the
finished model was battle-damaged! LOL
It wasn't so much that plastic turns yellow over time that bothers me, but
that some apparently do not? I also happen to collect die cast models with plastic
parts, and in those cases, all plastic components turn yellow over time.
So it baffles me why 3 or 4 of the same brick within the same numbered bag yellowed
and others didn't? Is this merely because of uneven (heat?) exposure or because
they were from different batches in the factory (and therefore the older ones
turned yellow and the newer batches need more time)?
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I think it has more to do with exposure to air (oxidization) than exposure to
heat or light. Maybe the faces that weren't yellowed were covered by other
bricks? ...Perhaps your different batches theory is more likely.
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AFAIK, it’s actually quite complex. For storage, humidity, temperature, and
UVs are the main parameters but there are surely others.
And there might be the temperature of the mould or humidity in the factory when
the part was moulded or other such parameters.
Many guesses….
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Message is in Reply To:  Re: Yellowing of bricks - rylie_aitch (256) | [...] I think it has more to do with exposure to air (oxidization) than exposure to heat or light. Maybe the faces that weren't yellowed were covered by other bricks? [...]
(31 months ago, Nov 7, 2021, to LEGO products) |
8 Messages in this Thread: Msg 1 - amvdamian (475) 31 months ago Nov 7, 2021 to LEGO products
 Msg 2 - rylie_aitch (256) 31 months ago Nov 7, 2021 to LEGO products
  Msg 3 « - SylvainLS (46) 31 months ago Nov 7, 2021 to LEGO products
Msg 4 - cosmicray (3498)  31 months ago Nov 7, 2021 to LEGO products
Msg 5 - amvdamian (475) 31 months ago Nov 7, 2021 to LEGO products
Msg 6 - bobnikolov (1882) 31 months ago Nov 8, 2021 to LEGO products
Msg 7 - taxan (145) 31 months ago Nov 8, 2021 to LEGO products
Msg 8 - tec (62) 31 months ago Nov 8, 2021 to LEGO products
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France, Nouvelle-Aquitaine
