English Amiga Board


Go Back   English Amiga Board > Support > support.Hardware

 
 
Thread Tools
Old 05 September 2008, 15:53   #161
chiark
Needs a life

chiark's Avatar
 
Join Date: Jan 2008
Location: England
Posts: 1,629
peroxide = hydrogen peroxide, availble from chemists typically in 3% or 6% concentration. 30% recommended, and maybe available from hairdressers

oxy = vanish oxy powder (tradename of a cleaning product). In the UK, it comes in bright pink containers and is sold in supermarkets, etc.
chiark is offline  
Old 05 September 2008, 16:01   #162
AlfaRomeo
A1200 040 SAM440EP 667
AlfaRomeo's Avatar
 
Join Date: Jan 2008
Location: Lisbon / Portugal
Posts: 793
If you could post some photos so I see if could recognise from any supermarket...
AlfaRomeo is offline  
Old 05 September 2008, 16:16   #163
Zetr0
Ya' like it Retr0?
Zetr0's Avatar
 
Join Date: Jul 2005
Location: United Kingdom
Age: 43
Posts: 9,768
Quote:
Originally Posted by AlfaRomeo View Post
If you could post some photos so I see if could recognise from any supermarket...
meh... its a post count

OXY ( contains the ingredient TAED, an accelerant to the process)


anything with (Oxy Action will contain a source of TAED) all though the process doesn't need this, it will speed up reaction and result times emensley.


HH2O


peroxide, or its full name Hydrogen peroxide, can come from many places, like hair saloons /barbers or just about any Hair dying product.

the above is its most common 6% form from the chemist, however you can get (*and will need*) stronger concentration, around 25% or higher.

Dark Light / UV


This is another accelerant to the process, by blasting the component with UV rays we destablize the weak electron bonds of the oxygen atom that is attachted to the bromine atom from the flame retardant chemical in the plastic.

by inducing a pull on that oxygen atom, (surrounding it with hungry Hydrogen atoms) as well as bathing it in UV light this will essentially de-oxidize the plastic to its original colour, or there about's.


I will say this process is ONLY TEMPORY and the component will need to be treated to stop future oxidation.
Zetr0 is offline  
Old 05 September 2008, 16:34   #164
AlfaRomeo
A1200 040 SAM440EP 667
AlfaRomeo's Avatar
 
Join Date: Jan 2008
Location: Lisbon / Portugal
Posts: 793
Thanks for the explanation and photos Zetr0 now I will try to find this products on the supermarket
AlfaRomeo is offline  
Old 05 September 2008, 16:43   #165
tonyyeb
Has the Amiga bug again
tonyyeb's Avatar
 
Join Date: Oct 2007
Location: Hull, UK
Age: 38
Posts: 791
Send a message via MSN to tonyyeb
Quote:
Originally Posted by Merlin View Post
.... and 1/8 teaspoonful per gallon of Oxy.
Ha! That is where I went a bit wrong. About a dessert spoon to 1 litre I did! No wonder it foamed up quite a bit! We were expecting more of a reaction... so we kept adding more! lol!
tonyyeb is offline  
Old 05 September 2008, 18:50   #166
DDNI
Targ Explorer

DDNI's Avatar
 
Join Date: Mar 2006
Location: Northern Ireland
Age: 44
Posts: 5,181
Send a message via ICQ to DDNI Send a message via MSN to DDNI
Tonyyeb, you also went wrong by hitting your mouse with a sledge hammer
DDNI is offline  
Old 05 September 2008, 20:45   #167
tonyyeb
Has the Amiga bug again
tonyyeb's Avatar
 
Join Date: Oct 2007
Location: Hull, UK
Age: 38
Posts: 791
Send a message via MSN to tonyyeb
Quote:
Originally Posted by DDNI View Post
Tonyyeb, you also went wrong by hitting your mouse with a sledge hammer
Lol!

Thankfully some kind Amiga users have sold/sent me a replacement (or three! ooops!) They will come in handy as my A600 didn't come with one, also I now have a spare. Amigakit threw an old second hand one with my last order as well which was very kind as I was mouse-less until then. Cheers Amigakit!
tonyyeb is offline  
Old 06 September 2008, 03:39   #168
rkauer
I hate potatos and shirts
rkauer's Avatar
 
Join Date: Oct 2007
Location: Sao Leopoldo / Brazil
Age: 52
Posts: 3,482
Send a message via MSN to rkauer Send a message via Yahoo to rkauer
Quote:
Originally Posted by AlfaRomeo View Post
Thanks for the explanation and photos Zetr0 now I will try to find this products on the supermarket
@AlfaRomeo: the product is called "√°gua oxigenada" and the oxy thing have a common brand of "Vanish 'poder O2' " on any supermarket.

The peroxide is more easily found on "women cosmetic stores" sort of. It's the very same intended for "blonding" the hair.
rkauer is offline  
Old 06 September 2008, 05:37   #169
T_hairy_bootson
Workbitch 1.3

T_hairy_bootson's Avatar
 
Join Date: Oct 2001
Location: Melbourne, Australia
Age: 41
Posts: 2,028
Best Hydrogen peroxide I can find on the net in Australia seems to be 19% It comes in one litre or five litre bottles and is sold from pool/spa shops. So you guys are submerging the parts in the stuff you must need a lot more than 473mil depending on the part or are you diluting it with water?

19% Hydrogen Peroxide


We also have Vanish Oxy Action here it is sold under the NapiSan brand name, not sure if it contains TAED though.

NapiSan Vanish Oxy Action
T_hairy_bootson is offline  
Old 06 September 2008, 11:39   #170
Merlin
AmiBay MegaMod
Merlin's Avatar
 
Join Date: Mar 2007
Location: Manchester, UK
Age: 56
Posts: 1,163
@ THB

If it says "Oxy Action" it's the right stuff.

Regarding peroxide, you may be able to get it larger quantities at 30% strength if you look around pet supplies for something called "Urine Rescue" (ewww.....)

Lorne of The Vintage Computer Forums found this stuff, it's a lot cheaper too.....
Merlin is offline  
Old 06 September 2008, 12:08   #171
laser
Banned
 
Join Date: Aug 2006
Location: Argentina
Age: 45
Posts: 648
I have made lots of experiments recently with h2o2 and I found that the best accelerator is heat...
UV light doesn't works ....I think is a myth

I used a stove which produce hot air as accelerator...and I can guarantee that on 24 hs and 20% h202 bleach totally anything yellowed ...plastics and gums

also I have bleached the keys of some of my remote controls (gum)....keys originally gray but yellowed after some time...and now of course returned to gray
laser is offline  
Old 06 September 2008, 21:40   #172
prart
Registered User
 
Join Date: Mar 2008
Location: somewhere
Posts: 57
but what about those sticker/badge/whatever with "Commodore" and "Axxx" names: do i need to secure it somehow? tape, glue? does this process will wash my beloved "A600HD" name?
prart is offline  
Old 06 September 2008, 22:09   #173
Eclipse
Turpentine
Eclipse's Avatar
 
Join Date: Oct 2007
Location: Kent, United Kingdom
Posts: 743
If you get lots of Hydrogen Peroxide be careful if you live in the UK. Some chemists will report you.
Eclipse is offline  
Old 07 September 2008, 00:33   #174
Dexther
Registered User
 
Join Date: Aug 2005
Location: italy
Age: 41
Posts: 145
I need italian to take me a heads
Dexther is offline  
Old 07 September 2008, 03:05   #175
rkauer
I hate potatos and shirts
rkauer's Avatar
 
Join Date: Oct 2007
Location: Sao Leopoldo / Brazil
Age: 52
Posts: 3,482
Send a message via MSN to rkauer Send a message via Yahoo to rkauer
Quote:
Originally Posted by prart View Post
but what about those sticker/badge/whatever with "Commodore" and "Axxx" names: do i need to secure it somehow? tape, glue? does this process will wash my beloved "A600HD" name?
Stickers aren't affected. Don't worry.
rkauer is offline  
Old 09 September 2008, 13:19   #176
Merlin
AmiBay MegaMod
Merlin's Avatar
 
Join Date: Mar 2007
Location: Manchester, UK
Age: 56
Posts: 1,163
Quote:
Originally Posted by laser View Post
I have made lots of experiments recently with h2o2 and I found that the best accelerator is heat...
UV light doesn't works ....I think is a myth

I used a stove which produce hot air as accelerator...and I can guarantee that on 24 hs and 20% h202 bleach totally anything yellowed ...plastics and gums

also I have bleached the keys of some of my remote controls (gum)....keys originally gray but yellowed after some time...and now of course returned to gray
Sorry dude, Lorne over at Vintage Computer Forums disagrees with your heat theory; he lives in Arizona and heat isn't a problem there. Heat alone doesn't cut it; UV is definitely required.

Read the later posts in this thread:-

http://www.vintage-computer.com/vcfo...light=peroxide

Lorne is working to optimise the process and he has proved to himself that UV is needed, the UV photons destabilise the co-ordinate bond between the oxygen and the Bromine in the flame retardant (the bond isn't strong enough to be a covalent bond, so it has to be shared electrons between the oxygen and the bromine). No UV, the parts only get wet.

Using bleach to remove the yellowing is only replacing Bromine with Chlorine from the sodium hypochlorite in the bleach; Bromine and Chlorine are both Group VII elements (Halogens) and have one free electron space in the outer orbital. The Chlorine is higher in the Halogen series than Bromine and hence displaces Bromine as it is more reactive. Some yellowing will still occur, as Chlorine will share electrons with oxygen atoms in the same way Bromine will, via a co-ordinate bond.

Please feel free to disprove my theories on this, as long as you can provide some kind of logical chemistry argument to back it up.



Merlin

Last edited by Merlin; 09 September 2008 at 13:28.
Merlin is offline  
Old 09 September 2008, 15:23   #177
protek
Amiga hobbyist
protek's Avatar
 
Join Date: Aug 2008
Location: Oulu, Finland
Posts: 213
I've managed to get whitened results with only 6% solution of H2O2, so it doesn't necessarily have to be the strong stuff.
protek is offline  
Old 09 September 2008, 16:21   #178
Merlin
AmiBay MegaMod
Merlin's Avatar
 
Join Date: Mar 2007
Location: Manchester, UK
Age: 56
Posts: 1,163
Quote:
Originally Posted by protek View Post
I've managed to get whitened results with only 6% solution of H2O2, so it doesn't necessarily have to be the strong stuff.
I agree; most beauty supplies won't sell stronger than 20%, as above that strength it can burn and damage skin and eyes. A lower strength gives more safety to people and better control of the de-yellowing process at the expense of a little bit more time, I don't feel it's a bad trade off overall.
Merlin is offline  
Old 09 September 2008, 16:35   #179
tonyyeb
Has the Amiga bug again
tonyyeb's Avatar
 
Join Date: Oct 2007
Location: Hull, UK
Age: 38
Posts: 791
Send a message via MSN to tonyyeb
Anyone know where to a get a cheap, suitable UV lamp in the UK? Mail order / Internet preferable. (Link if possible!)
tonyyeb is offline  
Old 09 September 2008, 16:58   #180
Merlin
AmiBay MegaMod
Merlin's Avatar
 
Join Date: Mar 2007
Location: Manchester, UK
Age: 56
Posts: 1,163
Here you go....

http://www.maplin.co.uk/Module.aspx?ModuleNo=33124
http://www.maplin.co.uk/Module.aspx?ModuleNo=24245

Merlin is offline  
 


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
A500+ Colour / Yellowing? craggus2000 support.Hardware 25 22 November 2010 09:24
Removing Yellowing using H2O2, TAED & UV alexh support.Hardware 31 21 February 2010 23:48
Guide to removing yellowing of plastics tonyyeb support.Hardware 38 28 November 2009 19:23
Partial yellowing? Akira support.Hardware 21 04 July 2008 00:46
Yellowing BippyM support.Hardware 56 03 January 2003 20:08

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +2. The time now is 17:37.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Page generated in 0.10240 seconds with 13 queries