Do not Retrobright - Watch this first
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- เผยแพร่เมื่อ 8 เม.ย. 2023
- Do not retrobroght until you have watch this video which is based on 3 years of using different methods with long term verifiable results.
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You keep mentioning the discolouring is down to the Bromine coming to the surface, it has nothing to do with the Bromine, it is the change in the chemical structures due to oxidisation that causes the light being reflected off the surface to be at a different wavelength, trending towards yellower end of the spectrum. That's the same change in chemical structure that makes plastics brittle.
no content off u in a while bud hope all is ok
I use hydrogen peroxide mixed with oxyclean on my Atari st years ago and it didn't harm the plastic.
Thank you for sharing some of the reconditioning methods you use. In the 30+ computers I've reconditioned, I've definitely noticed a large amount of variability in the plastic quality. I'm certain much of it is due to the "life" the computers had led over 30+ years, but there are definitely a few examples of lower quality plastic at production. I have tried multiple methods ranging from sanding, to painting to retrobriting cream, to retrobriting submersion. I've only experienced two situations where I believe the retrobriting feels like it may have degraded the plastic. This is good material so folks don't go into retrobriting expecting it to work like magic without possibly damaging the plastics....it can happen perfectly this way, but sometimes it won't be pretty.
Unfortunately, painting can lead to embrittlememt of the plastic too.
A lot of spray paints, including those intended for plastics, contain solvents like acetone.
These cause ABS plastic to become brittle over time (a couple of years).
I don't know what the mechanism for this is, because the acetone would be long gone, but it must affect the structure of the plastic somehow.
Maybe it causes some of the plasticizers to migrate?
I had this happen on a UPS I refurbished. I had given the face plate a coat of spray paint intended for plastics, but only in the area that was visible when the unit was assembled.
It was under my desk, and one day, I idly rested my foot on it, and I felt it crack.
On further inspection, the parts that I had sprayed were brittle, and could be broken apart with almost no pressure, exactly like the Apple machine in this video.
Areas of the plastic that had not received any paint were fine, and would bend instead of breaking.
Mac’s made when CEO Michael Spindler was around are notorious for brittle plastics. It has nothing to with retrobriting. I have Mac’s from that era, they were made with cheap plastics. Remember apple was in the red back then.
You're making the mistake of associating bad plastics, like in the Apple monitor with retro brightening. It's not the same degradation.
There are UV sprays to protect after retrobriting.
Do you know any brand in particular? Or were to find it ?
@@angelraices5793 I recently used “303 Aerospace Protectant” .. It has a matt finish and non greasy feel..
Sorry, forgot o add… Easily found online..
So, bromine in the plastic was a fire-retardant, was it? I've learnt something today. Thank you.
The old beige Apples are known for having poor quality plastic.
Not poor at the time, but poor in context of 40 odd years. None of the older PC companies expected the PC's to be used decades later and didnt plan for it, that so many lasted so long is luck more than anything else.
Hi thanks for the video. Since your video many of the points you make at the top have been debunked, one of them is bromine - it has no influence. Still your video and your experiences and methods are appreciated.
i did it once on my amiga 500 after i could feel how brittle the plastic became and i had major marble effect so i got plastic paint and primer , it looks brill now but i did paint the keys but iv now seen stickers in black or white so think of repaint and do it in black then the key in black and white and get the stickers for the keys
Yep, Apple has poor quality plastics. What else is new? The only relevant testing would be like for like. There are plenty of people who have retrobrighted hardware without it going brittle. It all depends on the quality of the plastics used in the first place, as well as the level of degradation, which depends on how the system has been stored and such.
I’m not sure that the problems with the plastic used on Mac casings is the same as the issues with retrobriting. Apple plastics from the 90s are notoriously bad, but we don’t see such severe problems with for example Atari casings from the 1970s, or even Apple ][ casings from the 80s. Personally I’m ok with a bit of yellowing so I have only ever used retrobrite on one of my computers - an orange Apple //c.