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Take the yellow out of your old Mac cases!
Posted by: Z
Date: March 03, 2009 10:58AM
Came across this in the morning readingses:

[retr0bright.wikispaces.com]



Quote
From the article
Dave from Manchester, UK, aka 'Merlin', the chemist behind the project, explains. “I came across the use of peroxide in July 2008 when Kristian95 told us about what people like AmigaGTI were doing with it over at a1k.org. I was intrigued by this, as I am a former industrial chemist. I am also a plant Safety Manager by trade and, purely by coincidence, around that time I read about a dust explosion that had occurred in the UK with a chemical called TAED, which is the booster in the ‘active oxygen’ laundry products.”

“This got me thinking, and after some really 'full-on', serious chemistry discussions with other EAB members, like Rkauer in Brazil, who is a plastics Engineer and my good friend Zetr0 from Kings Lynn, Norfolk, UK, who endured endless phone calls from me. We wrote some epic threads on English Amiga Board about the possible causes of the yellowing and eventually we arrived at the theory that it was the Bromine in the flame retardant that was the cause. We also knew that Ultra Violet light was another major factor. Having identified the culprit, the next stage was to try to develop and perfect a means of treating the plastic and reversing the yellowing without damaging the plastic. Being a former industrial chemist helped me tremendously, in understanding what was going on at the molecular level and to develop a treatment process to reverse the effect.”

“The problem was finally cracked in late July 2008 with a mixture of hydrogen peroxide, a small amount of an “Oxy” laundry booster as a catalyst and a UV lamp. Proof of this concept was demonstrated on EAB by Tonyyeb from Hull, UK, Chiark from Leeds, UK and myself.



Edited 1 time(s). Last edit at 03/03/2009 11:11AM by Z.
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Re: Take the yellow out of your old Mac cases!
Posted by: mikebw
Date: March 03, 2009 11:00AM
That's neat, but those two objects do not appear to be the same.
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Re: Take the yellow out of your old Mac cases!
Posted by: pRICE cUBE
Date: March 03, 2009 11:06AM
I was just thinking about yellowing of plastic. Too bad the items are different as mikebw points out.



Ways to improve web conference image and sound quality. [forums.macresource.com]


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Re: Take the yellow out of your old Mac cases!
Posted by: Z
Date: March 03, 2009 11:07AM
True, I did not grab the best picture. Then again, no two Osbornes were alike. ;) Perhaps a better image:



or this





Edited 1 time(s). Last edit at 03/03/2009 11:08AM by Z.
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Re: Take the yellow out of your old Mac cases!
Posted by: cbelt3
Date: March 03, 2009 11:19AM
That is VERY nice. My old Mac Plus would have looked spiffier ! And.... Osbornes ! w00t !
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Re: Take the yellow out of your old Mac cases!
Posted by: papercup
Date: March 03, 2009 11:19AM
The easiest way to take the yellow out of the cases is to take the cases to the curb.
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Re: Take the yellow out of your old Mac cases!
Posted by: kj
Date: March 03, 2009 11:49AM
Quote
mikebw
That's neat, but those two objects do not appear to be the same.

They _could_ be. It looks like the fan is removeable, and surely the door on top is. It would make more sense if the door was removed on the clean pic instead of the dirty one, though. kj.
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Re: Take the yellow out of your old Mac cases!
Posted by: mikebw
Date: March 03, 2009 11:54AM
Quote
kj
Quote
mikebw
That's neat, but those two objects do not appear to be the same.

They _could_ be. It looks like the fan is removeable, and surely the door on top is. It would make more sense if the door was removed on the clean pic instead of the dirty one, though. kj.

True enough.
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Re: Take the yellow out of your old Mac cases!
Posted by: Big Daddy Cool
Date: March 03, 2009 01:09PM
Followed that thread last night. I believe. It's abunch of old computer nerds who just happen to be chemical engineers. I'm going to have the brightest Laserwriter on the block!
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Re: Take the yellow out of your old Mac cases!
Posted by: tenders
Date: March 03, 2009 01:11PM
> My old Mac Plus would have looked spiffier !

If I recall correctly, Mac Pluses started out with that kind of ecru color. It was the SE and the Classic in the "Platinum" finish that got kind of grungy over time.
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You'll wonder where the yellow went...
Posted by: RAMd®d
Date: March 03, 2009 01:18PM
That's nice work.

My Mac LC could use a light makeover.




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must suffer with him.

Everybody matters or nobody matters.

You and I have memories longer than the road that stretches out ahead.

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by believing all possible evil of evil men.

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Re: Take the yellow out of your old Mac cases!
Posted by: M>B>
Date: March 03, 2009 01:26PM
I hear 409 works well...

[www.thriftyfun.com]
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Re: Take the yellow out of your old Mac cases!
Posted by: Z
Date: March 03, 2009 01:31PM
Quote
Big Daddy Cool
Followed that thread last night. I believe. It's abunch of old computer nerds who just happen to be chemical engineers. I'm going to have the brightest Laserwriter on the block!

I partially resemble that comment... except for the old part. grinning smiley
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Re: Take the yellow out of your old Mac cases!
Posted by: MysteryGuest
Date: March 03, 2009 02:15PM
Quote
tenders
> My old Mac Plus would have looked spiffier !

If I recall correctly, Mac Pluses started out with that kind of ecru color. It was the SE and the Classic in the "Platinum" finish that got kind of grungy over time.

My Mac Plus was Platinum. I think the later models were. Didn't they produce that Mac for 10 years or something???
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Re: Take the yellow out of your old Mac cases!
Posted by: macphanatic
Date: March 03, 2009 07:12PM
Softscrub and a soft cloth works as well.
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Re: Take the yellow out of your old Mac cases!
Posted by: ka jowct
Date: March 03, 2009 08:53PM
The easiest way to take the yellow out of the cases is to take the cases to the curb.

Also an easy way to add yellow, if there are lots of dogs in your neighborhood.
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