| Discussion Forum: Thread 321648 |
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| | | Author: | TheCuteGiraffe  | | Posted: | May 26, 2022 05:25 | | Subject: | How Do I Clean Lego? | | Viewed: | 127 times | | Topic: | Help | |
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| Hey Bricklinkers,
I bought an old lego set that was in a spot for years at least 5 years. Some
of the parts, specifically the light bluish grey and dark bluish grey have got
this odd yellow tinge to them.
All parts in the photo are supposed to be Light Bluish Grey
As you can see with the 1x2 plates with bars, they have the bar part yellowed.
All parts have a different degree of yellowing.
I don't want to try anything because one of the parts is Hamm from Toy Story
and I don't want to remove any printing from him.
Below I have attached an image of the yellowed parts so you know what the issue
is.
Please suggest anyways I can clean them.
Thanks,
The Cute Giraffe
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| | | | | Author: | axaday | | Posted: | May 26, 2022 07:18 | | Subject: | Re: How Do I Clean Lego? | | Viewed: | 49 times | | Topic: | Help | |
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| The yellowing is a chemical change to the plastic. Some techniques have been
developed to hide the yellowing, but I don’t think they are permanent or actually
fix the issue. I would consider those pieces ruined.
In Help, TheCuteGiraffe writes:
| | Hey Bricklinkers,
I bought an old lego set that was in a spot for years at least 5 years. Some
of the parts, specifically the light bluish grey and dark bluish grey have got
this odd yellow tinge to them.
All parts in the photo are supposed to be Light Bluish Grey
As you can see with the 1x2 plates with bars, they have the bar part yellowed.
All parts have a different degree of yellowing.
I don't want to try anything because one of the parts is Hamm from Toy Story
and I don't want to remove any printing from him.
Below I have attached an image of the yellowed parts so you know what the issue
is.
Please suggest anyways I can clean them.
Thanks,
The Cute Giraffe
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| | | | | | | Author: | Than23 | | Posted: | May 26, 2022 07:59 | | Subject: | Re: How Do I Clean Lego? | | Viewed: | 52 times | | Topic: | Help | |
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| In Help, axaday writes:
| | The yellowing is a chemical change to the plastic. Some techniques have been
developed to hide the yellowing, but I don’t think they are permanent or actually
fix the issue. I would consider those pieces ruined.
|
Try a solution of 80-90% water 10-20% hydrogen peroxide and let the pieces sit
in that for a week or so. I've used that to brighten up older lego pieces
that are dirty and/or have faded and have had success with it. It has also been
able to reduce (but not completely remove) the yellowing.
| | In Help, TheCuteGiraffe writes:
|
| | | | Hey Bricklinkers,
I bought an old lego set that was in a spot for years at least 5 years. Some
of the parts, specifically the light bluish grey and dark bluish grey have got
this odd yellow tinge to them.
All parts in the photo are supposed to be Light Bluish Grey
As you can see with the 1x2 plates with bars, they have the bar part yellowed.
All parts have a different degree of yellowing.
I don't want to try anything because one of the parts is Hamm from Toy Story
and I don't want to remove any printing from him.
Below I have attached an image of the yellowed parts so you know what the issue
is.
Please suggest anyways I can clean them.
Thanks,
The Cute Giraffe
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| | | | | | | Author: | SylvainLS | | Posted: | May 26, 2022 08:09 | | Subject: | Re: How Do I Clean Lego? | | Viewed: | 59 times | | Topic: | Help | |
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| In Help, axaday writes:
| | The yellowing is a chemical change to the plastic.
|
It’s photo-oxydation (= oxydation triggered/helped by light, or more particularly
UV light).
| | Some techniques have been
developed to hide the yellowing, but I don’t think they are permanent or actually
fix the issue. I would consider those pieces ruined.
|
It’s not “hiding.” Painting would be hiding.
It’s either “reversing” or “bleaching” (depends on how you do it and there’s
debate on how it really works).
But, anyway, that’s indeed not permanent because the causes are still there.
It may also damage the plastic (UV do that to plastics, so it’s already what
happens when the parts are yellowed, but those techniques may accelerate the
process).
(Oxydation = adding oxygen; it also breaks the polymer chain. Peroxyde+UV =
removes the oxygen but doesn’t fix the chain; so the oxygen can come back and
the plastic is still degraded.)
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| | | | | Author: | bricksonmove | | Posted: | May 26, 2022 07:23 | | Subject: | Re: How Do I Clean Lego? | | Viewed: | 53 times | | Topic: | Help | |
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| In Help, TheCuteGiraffe writes:
| | Hey Bricklinkers,
I bought an old lego set that was in a spot for years at least 5 years. Some
of the parts, specifically the light bluish grey and dark bluish grey have got
this odd yellow tinge to them.
All parts in the photo are supposed to be Light Bluish Grey
As you can see with the 1x2 plates with bars, they have the bar part yellowed.
All parts have a different degree of yellowing.
I don't want to try anything because one of the parts is Hamm from Toy Story
and I don't want to remove any printing from him.
Below I have attached an image of the yellowed parts so you know what the issue
is.
Please suggest anyways I can clean them.
|
Bin them nothing works to de yellow (sun effected lego) white and light bluish
grey are main colours that suffer this from been in direct sunlight. the sunlight
effect the lego over time and yellows them. Any method to try to de yellow
will fail and only fix it temp a few months and it will return worst.
I would suggest throwing these and looking for replacement part. the ones in
your photo are pretty common parts and easy to find
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| | | | | | | Author: | TheCuteGiraffe | | Posted: | May 26, 2022 23:47 | | Subject: | Re: How Do I Clean Lego? | | Viewed: | 37 times | | Topic: | Help | |
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| | Thanks All! |
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