Making the most of the sun

for all subjects/topics not covered by the other forum categories
Post Reply
beeboldie
Posts: 36
Joined: Tue Apr 23, 2019 12:30 pm
Contact:

Making the most of the sun

Post by beeboldie » Wed May 15, 2019 10:37 am

Taking advantage of the rare UK sunshine :-)

In the last few days I've peroxided...
2 BBC Masters
2 BBC Micros
1 Electron
1 Econet terminator box
... and I have my BBC Master Compact in bits in the sun at the moment - should be done in about an hour.

I use 12% (ie. "40 vol") cream pasted straight on then covered in cling film.

Great UV at the moment. The cases only need an hour or so to change dramatically. Within a few hours they are like new.
I also did the keytops - the lettering transformed back to the white colour that I haven't seen for years in just an hour.

Great fun.

Grant

User avatar
trixster
Posts: 868
Joined: Wed May 06, 2015 11:45 am
Location: York
Contact:

Re: Making the most of the sun

Post by trixster » Wed May 15, 2019 10:50 am

You’re sure using peroxide will not adversely affect the plastics? I’d be worried it might make stuff weaker/more brittle
A3020 | A3000 | A420/1 | BBC B | Master Turbo | ZX48K | NeoGeo
Atom | Amiga A4000 | A3000 | A1200 | A500 | PC Engine | Enterprise
Falcon | Saturn | PS1 | SNES | CPC6128 | C64 | 3DO | MD | Jaguar | X68000 | CD32

beeboldie
Posts: 36
Joined: Tue Apr 23, 2019 12:30 pm
Contact:

Re: Making the most of the sun

Post by beeboldie » Wed May 15, 2019 12:41 pm

Maybe it does a bit (no idea to be honest), but nothing indicates that it has - the plastic comes up perfect and shiny as the original was - no cracking/crazing or whatever. I've used it for a few years on many things - various computers (Amiga, Sharp etc etc), retro HiFi and other gadgets. All come back pristine with no visible damage to the plastic and are still good years later.
After all - it only treats the surface - it cannot penetrate into the plastic as it does not dissolve the plastic in any way (like acetone would).

I stop the process as soon as the yellowing has gone.

The BBC Master Compact that I put out in the sun a few hours earlier is already complete and it is only lunchtime :-) washed down and back in the house and looks great. There was a sticker on the back and when removed showed the original colour - that has now completely disappeared as the surrounding plastic is back to the same colour.
IMG_20190515_134841_resized_20190515_014935144.jpg
Never had any issues with the peroxide myself. Had white blooming on one item a couple of years ago but that was my fault as I left it out all day when I should have brought it in after an hour or so - a small bit of polishing with Brasso (T-Cut etc) got rid of the white as it was only on the surface.

From my experience I can thoroughly recommend it - just don't be tempted to overdo it.

Grant
Last edited by beeboldie on Wed May 15, 2019 12:50 pm, edited 6 times in total.

User avatar
0xC0DE
Posts: 228
Joined: Tue Mar 19, 2019 7:52 pm
Location: The Netherlands
Contact:

Re: Making the most of the sun

Post by 0xC0DE » Wed May 15, 2019 1:12 pm

Nice work!

Curious about the Electron. Do you remove or protect any stickers before treatment? Like the serial number on the bottom or the large Acorn Electron banner on the top of the case. What about the rubber feet?

Any before and after pictures of your Electron?
0xC0DE
Visit my YouTube channel featuring my demos for Acorn Electron and BBC Micro

beeboldie
Posts: 36
Joined: Tue Apr 23, 2019 12:30 pm
Contact:

Re: Making the most of the sun

Post by beeboldie » Wed May 15, 2019 1:33 pm

Thanks. Didn't have to remove any stickers on the Electron. Pasted over the main sticker on the front - it didn't affect it. Here is the one that I did a day or so ago...
IMG_20190515_143041_resized_20190515_023112204.jpg

markdryan
Posts: 78
Joined: Sun Aug 20, 2017 10:37 pm
Contact:

Re: Making the most of the sun

Post by markdryan » Wed May 15, 2019 1:38 pm

I've been trying to Lightbright (just leave it in the sunshine without chemicals) my riscpc keyboard in the Dutch sun over the last couple of days. There does seem to be a slight improvement.
lightbright.jpg
Edit: I should add that the image on the left is the lightbrighted keyboard.
Last edited by markdryan on Wed May 15, 2019 1:39 pm, edited 1 time in total.

Diminished
Posts: 154
Joined: Fri Dec 08, 2017 9:47 pm
Contact:

Re: Making the most of the sun

Post by Diminished » Wed May 15, 2019 1:41 pm

My BBC badly needs this doing.

Is this just standard off-the-shelf hair bleaching stuff? I read the stuff about making RetroBrite a few years ago, but it seemed like a bit of a faff.

beeboldie
Posts: 36
Joined: Tue Apr 23, 2019 12:30 pm
Contact:

Re: Making the most of the sun

Post by beeboldie » Wed May 15, 2019 1:53 pm

Standard hair stuff (but the stronger concentration) - the ones in the shop may only be 6% which may not work. Got mine from Amazon.
Important to get strong stuff - 12% (also refered to as 40 vol).
Pictured below but other brands exist. A 1 litre bottle is quite cheap when bought online.
The Retrobrite was too much messing about - it is only peroxide in a cream, which you can now get ready made easily.
This is what I use...
IMG_20190515_144737_resized_20190515_024801484.jpg
Turns your fingers white but they recover after a few hours (I SHOULD wear gloves!). Also stings after a couple of minutes so need to wash with lots of water.
Washes off the item with plain water VERY easily - it dissolves in water.

User avatar
flibble
Posts: 698
Joined: Tue Sep 22, 2009 10:29 am
Contact:

Re: Making the most of the sun

Post by flibble » Wed May 15, 2019 2:15 pm

trixster wrote:
Wed May 15, 2019 10:50 am
You’re sure using peroxide will not adversely affect the plastics? I’d be worried it might make stuff weaker/more brittle
Retrobrite = peroxide mixed with a gel to make it stick on better.

The same trick of dunking plastics in a peroxide bath and turning on a UV lamp is also a good way to recover yellowed grey and white lego pieces.

User avatar
flibble
Posts: 698
Joined: Tue Sep 22, 2009 10:29 am
Contact:

Re: Making the most of the sun

Post by flibble » Wed May 15, 2019 2:19 pm

Actually I should clarify, I've not seen any reports of brittleness or structural issues with peroxiding things, however I have seen the occasional complaint of mottled patterns on the resulting plastics.

beeboldie
Posts: 36
Joined: Tue Apr 23, 2019 12:30 pm
Contact:

Re: Making the most of the sun

Post by beeboldie » Wed May 15, 2019 2:38 pm

Result of today's sun...
IMG_20190515_153435_resized_20190515_033510247.jpg
It is now the correct colour (same as the inside of the case).

Thankfully still works !

Grant
Last edited by beeboldie on Wed May 15, 2019 4:50 pm, edited 2 times in total.

User avatar
simonm
Posts: 285
Joined: Mon May 09, 2016 2:40 pm
Contact:

Re: Making the most of the sun

Post by simonm » Wed May 15, 2019 10:54 pm

This is glorious stuff, I love seeing machines getting restored colours. I've been doing the same recently (particularly over the easter sunny bank holiday) - it's SO satisfying! :lol:

I've taken some almost-orange Archimedes keyboards and mice back to their former glory using the exact same method. Takes 10 minutes to paint on & clingfilm, and a couple of hours in the sun. Wipe down with damp cloth and brush out any left overs. Had no problems at all, and always a huge improvement.

I use this stuff: https://www.sainsburys.co.uk/webapp/wcs ... oxide-75ml
Just paint it on evenly and thinly with a nylon brush, and take care not to dislodge any when wrapping (or you'll get streak effects).
2018-09-27 18.50.46.jpg
2018-09-02 15.35.27.jpg
before
2018-09-27 18.50.22.jpg
after!
2018-09-02 18.24.56.jpg
after!
Last edited by simonm on Wed May 15, 2019 11:05 pm, edited 4 times in total.

User avatar
simonm
Posts: 285
Joined: Mon May 09, 2016 2:40 pm
Contact:

Re: Making the most of the sun

Post by simonm » Wed May 15, 2019 11:03 pm

2019-04-21 14.24.14.jpg
electron before
2019-04-22 13.48.22.jpg
electron after
I didn't even bother to disassemble this one and the keys came up lovely.
2019-05-12 14.26.41.jpg
arc keyboard before
2019-05-12 19.05.10.jpg
arc keyboard after
2019-04-21 13.24.31.jpg
a5000 before
2019-04-21 15.01.26.jpg
2019-04-22 15.15.21.jpg
2019-04-22 18.57.06.jpg
looking much better!
2019-04-22 18.57.21.jpg
no more ganky mouse!
2019-04-22 18.57.27.jpg
shame about the labels!

User avatar
daveejhitchins
Posts: 4975
Joined: Wed Jun 13, 2012 5:23 pm
Location: Newton Aycliffe, County Durham
Contact:

Re: Making the most of the sun

Post by daveejhitchins » Thu May 16, 2019 8:11 am

beeboldie wrote:
Wed May 15, 2019 1:33 pm
Thanks. Didn't have to remove any stickers on the Electron. Pasted over the main sticker on the front - it didn't affect it. Here is the one that I did a day or so ago...

IMG_20190515_143041_resized_20190515_023112204.jpg
Before I give Electron/Plus 1 cases a 'wash' in the dishwasher I remove any Paper labels on the bottom, using gentle heat, and when replacing cut down slightly, restick and then apply a plastic cover.

I've not seen any issues with the main front sticker!

Dave H :D
Parts: UM6502CE, GAL22V10D, GAL16V8D, AS6C62256A, TC514400AZ, WD1772, R6522, TMS27C512, AT28C256
Products: ARA II, ARA III, ABR, ATI, AP6, MGC, AP5 . . .
For a price list, contact me at: Retro Hardware AT dave ej hitchins DOT plus DOT com

chinnyhill10
Posts: 103
Joined: Mon Apr 27, 2015 7:37 pm
Contact:

Re: Making the most of the sun

Post by chinnyhill10 » Thu May 16, 2019 1:04 pm

There are people currently experimenting without peroxide just using sunlight. The process is slower but they are getting results.

As ever with these things, treat with caution. It seems even chemical engineers don't seem to understand quite what is going on!

markdryan
Posts: 78
Joined: Sun Aug 20, 2017 10:37 pm
Contact:

Re: Making the most of the sun

Post by markdryan » Thu May 16, 2019 1:29 pm

chinnyhill10 wrote:
Thu May 16, 2019 1:04 pm
There are people currently experimenting without peroxide just using sunlight. The process is slower but they are getting results.
You can see some of those results further up the thread. viewtopic.php?f=11&t=17131#p237217

Post Reply