Collector's problem #1 - yellow/browning of vintage Apple cases.

Discussion in 'Apple Collectors' started by chatin, Aug 10, 2005.

  1. chatin macrumors 6502

    chatin

    Joined:
    May 27, 2005
    #1
    No wonder Apple switched to aluminum cases. In a hundred years, the computers will be as shinny metalic as the day they were made.

    But what to do about a vintage Apple Lisa, or Mac 512K that is in perfect, clean condition but... Yellow-Brown yuk colored?

    1) Why do some macs remain perfectly white - grey and others turn yellow brown?

    2) The plastic seems rotten to the core. That is, there are no layers of yellow to remove.

    Any plastics engineers lurking out there?

    ;) :)
     
  2. alex_ant macrumors 68020

    alex_ant

    Joined:
    Feb 5, 2002
    Location:
    All up in your bidness
    #2
    Owned by smokers?

    That would definitely explain it.
     
  3. 5300cs macrumors 68000

    5300cs

    Joined:
    Nov 24, 2002
    Location:
    japan
    #3
    This young lady seems to have had good luck in bleaching her machines. The link goes to an excellent online photo gallery of her collection.
     
  4. chatin thread starter macrumors 6502

    chatin

    Joined:
    May 27, 2005
    #4
    This is her "plesantly yellowed" mac plus.

    She seems to take it in stride. Check out her plesantly yellowed mac plus.


    [​IMG]
     
  5. nsutt22 macrumors regular

    nsutt22

    Joined:
    May 5, 2005
    #5
    Its custom...

    I have about 12 PowerMac 5260 era macs, a couple G3 All-in-ones and about 5 of the grand old classics and the only deductive conclusion as to color change is.....

    its custom :)

    Apple engineered speacil plastic that customly changes with age. Just wait 10 more years I here the next color is a rich blue!

    Old Mac's rule!

    -NSutt-
     
  6. rainman::|:| macrumors 603

    rainman::|:|

    Joined:
    Feb 2, 2002
    Location:
    iowa
    #6
    it's because of the chemical structure of the plastic. sometimes it can vary even on the same model, i have some Apple IIgs's at home that are pristine, some that are piss yellow, they all sat in the same lab their whole lives. If you get a plastic conditioner, you can often restore much the original color, texture, and strength. but if it's too far gone, nothing will fix it.
     
  7. Sdashiki macrumors 68040

    Sdashiki

    Joined:
    Aug 11, 2005
    Location:
    Behind the lens
    #7
    Id take a pic if i still had it but I my old SNES console turned a nice poo poo pee pee yellow color. Funny thing was, the case was 3 pieces, two bottom/top halves and then a rectangular piece that went where the cartridge slid in. That piece stayed perfectly nice and grey, but the other two halfs went nasty.

    Damn plastics. At least the N64 was black!
     
  8. Spock macrumors 68000

    Spock

    Joined:
    Jan 6, 2002
    Location:
    Vulcan
    #8
    Cleaning Classic plastic Macs with Window cleaner will make it yellow.
     
  9. TMA macrumors 6502a

    TMA

    Joined:
    Jan 6, 2003
    Location:
    England
    #9
    My Performa 6320 (RIP) - Went from beige to wee yellow. Combination of light damage and I started smoking half way through owning it.

    My iMac G3 (gone to a good owner) - Went yellow and even brown in some parts. I'm a smoker and I think that's what caused it. It was pretty foul.

    My PowerMac G5 - I have more faith in. Not very much plastic in it!

    iMac G4 Flat Panel (at work) - Interestingly this is going yellow around the vents at the top of the dome. We can't figure out why because it's not in direct sun light and obviously I don't smoke near it.

    iBooks - Tend to go yellow/brown around the wrist wrests - Ground in filth from sweaty wrists!
     
  10. clayj macrumors 604

    clayj

    Joined:
    Jan 14, 2005
    Location:
    visiting from downstream
    #10
    Don't forget the damage caused by prolonged exposure to UV rays. While a lot of stuff fades in too much UV, some materials will undergo a color change... there are even some types of optical glass that will turn yellowish when exposed to too much sunlight.

    You might want to look into investing in some UV-blocking window film if you have a room where you store all of these things.
     
  11. 5300cs macrumors 68000

    5300cs

    Joined:
    Nov 24, 2002
    Location:
    japan
    #11
    Windows? So who needs a room with windows?









    :D
     
  12. mkjj macrumors 6502a

    mkjj

    Joined:
    Jun 2, 2003
    Location:
    Liverpool
    #12
    Mac Photography

    I think the Danaquarium site has some of the very best old Mac photography i have ever seen, and the cleanest equipment ever! (I also asked how they get them so clean and bleach is the answer...and a lot of patience) Check out some of the close-ups of the backs and the ports, I don't think they where that clean when new!!

    http://www.danaquarium.com/gallery/
     
  13. chatin thread starter macrumors 6502

    chatin

    Joined:
    May 27, 2005
    #13
    Mac Plus made in beige and platinum!

    Old yellow eyes, pictured above... :rolleyes:


    The Mac Plus was made in two colors, beige and platinum. So when you see the platinum replacement mice that are everywhere, your plus was probably never that color!


    ;)
     
  14. generationxwing macrumors 6502

    generationxwing

    Joined:
    Feb 10, 2005
    Location:
    Calgary
    #14
    That is EXACTLY what happened to mine! That always bugged me. I wonder wtf was up with that?
     
  15. dmw007 macrumors G4

    dmw007

    Joined:
    May 26, 2005
    Location:
    Working for MI-6
    #15
    Certainly not I (at least not a room with windows os). :)
     

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