RetroMacCast

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RetroBright - SE/30 plastics AFTER

Here is the "after shot" which shows the cleaned system. I cleaned all the plastics on the SE/30, on the HD20 drive underneath and the IIgs keyboard. The Apple speakers you see were never yellowed. I bought these new in the box on EBAY -- they were never used by the owner and always stored in the box so they never yellowed. The speakers show just how perfect the RetroBright method is. It doesn't turn the plastics white. Instead it restores the plastics to their original platinum appears.

Yes, yes, if you look closely you can see that the front bezel of the SE/30 is not 100% deyellow as the back. But after staring at white cardboard all day outside, my eyes were shot. Another dose of RetroBright and a few hours in the sun would make the front and back sides match perfectly. But that will be for another day. Breaking apart my SE/30 was a chore I don't wish to repeat often!

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Comment by Alex Santos on August 7, 2015 at 12:26pm

One more comment if I may. On the topic of the same SE30 becoming slightly more yellowed…might this be due to the computer being exposed to sunlight or is it used in a room without this exposure. I am asking because form what I understand, these machines yellow to begin with due to sunlight (UV) exposure. Any comments in this regard?

All the best

—Alex

Comment by James Wages on August 7, 2015 at 4:37pm
Alex,

Regarding CRT discharge on old Macs, I highly recommend the following article written by Dr. Thomas Lee, republished by Lowendmac:

http://lowendmac.com/2007/the-truth-about-crts-and-shock-danger/

If you don't want to read all that and just want the practical application that I myself have tried with success and which doesn't rely on the bleeder resistor at all, do this:

Power-on your compact Mac. Crank up the brightness all the way. Yank the power cord. Wait two seconds. Now the CRT is discharged and you can pry off the suction cup with a screw driver.

I explained why that works on the 68kMLA a few years ago (I am JDW there):

https://68kmla.org/forums/index.php?/topic/17033-how-to-discharge-a...

On the topic of deyellowing, yes, the yellowing in my case did come back (not in full, mind you, but only slightly) even though the Mac has been well covered most of the time, with curtains drawn too. But it still looks better than it did prior to deyellowing, and so I have no regrets for spending the time and money deyellowing it.

So why in the absence of UV light did the plastics begin to yellow again after a year or so? I am not a chemist so I cannot say for sure. I don't think heat plays a role though because even keys in the keyboard (especially the space key) began to yellow again over time. And the slight return of yellow took place on parts I dipped in liquid RetroBright solution as well as the plastic chassis of the Mac, in which I used the Paste/Gel form of RetroBright. I will consider taking photos of the Mac for comparison purposes when I have the time.

I hope you find this information useful.
Comment by Ben on July 21, 2017 at 12:42pm

Thank you, James. I was going to do the "wait a day" discharge, but this way sounds even better!

Does anyone know why 68kmla.org won't validate my registration?

Comment by James Wages on July 21, 2017 at 8:26pm

 Hi Ben,

Thank you for your comment. 

The 68kMLA registration form was broken in June 2017.  Specifically, the CAPCHA part.  But I just now submitted a registration for another vintage Mac enthusiast and confirmed CAPCHA has been fixed.  However, and I dislike this part, the 68kMLA requires Admin approval for each new registration.  So it make take a couple days.  If you registered in the past and couldn't get past the silly CAPTCHA, then please try again because that has been fixed.  But if you have simply been awaiting Admin approval for your registration submission, then please tell me when you registered and I will see what strings I can pull to get your case expedited. Send me a private message with the username you tried to register and your email address too.  I'm not an Admin or a Mod, but I can pound on them for you.

For now, I would encourage you to check out the following Facebook group, where I am currently a member:

https://m.facebook.com/groups/644418325623804

 There are some excellent posts on applefritter.com as well:

http://www.applefritter.com/?q=forum

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