Any Aussie Amigans managed to make up some RetroBrite?

[stefcep2]

DO you have the exact name of the creme developer ?, I have a Priceline on the high street of my suburb and would not mind picking some up.

Does it work on keys ? or is there a Priceline product that has more concentration of H2O2 in liquid that I can put the keys in, over and above the usual 3% bottles.

You won't find pure peroxide anywhere.

I went to priceline and bought 12% peroxide Creme Developer,
"Innovative" brand, 1 litre for $10.  You MUST mix the Oxy washing
powder in with the peroxide-any brand eg Sards with oxy $5 for 1 litre
from Safeway.  No oxy powder, no work!!!I stirred about 1 teaspoon of
oxy powder dissolved in about 1/4 glass full of water into about 250ml
of creme developer.  I then got a small paint brush and just brushed the
creamy mix to the case every couple of hours out in the sun.  To stop it
drying you can add glycerol ( pharmacy $7) and xanthum gum, helath food
section in Coles, will give you a thick paste, but I didn't use xanthum
gum or glycerol.  You must also have UV light, lots of it, so I left my
case outside in 35 degree for 10 hours.

For your keys, I prised them off with a flat screw driver, put them into
a jar, and mixed up enough of the creme developer and oxy washing powder
to cover them all.  I had to use some more tap water (distilled water is
best apparantly,but I didn't) to dilute the mix, which means it takes
longer, but who cares the jar will just sit in the sun. 10 hours later
white keyboard. Don't cover the jar up with its lid, or it could
pressure and explode.

BTW the phosphoric acid in the Creme Developer is OK.

[stefcep2]

Hi all,

I managed to get the ingredients: "Innovative" 40vol Creme Developer 1000ml for $AU9.99 and 1kg (I know I'll never use it all!) Woolworths Home Brand "Nappy Treatment Plus" - which has exactly the same active concentration as the other brands and only cost AU$2.49 (hope it bloody well works!).

I've mixed up a very small batch (about 80ml) to try out on a A3000 'humpback' mouse which has mild yellowing on one side.

It's pretty sunny today, so I'll leave it out for the rest of the day (only about 4 hours of sunlight left) and try it some more tomorrow.

I have a couple of final (?) questions about the process:

1: Should there be a visible reaction (bubbling, etc) when I add the Oxy solution to the Creme Developer?

Yes.

2: How long does the mixed solution (with the Oxy added) last after being mixed?

Cheers,

Mike.

 Don't know.  I re-used what was left after doing my cases on the keys.  That means 2 days, I suppose.  Its pretty cheap to throw out what you haven't used.  BTW the two key ingredients are the oxy and UV in determining the rate at which the whitening occurs.  Also not all plastics whiten at the same rate and to the same degree.

[stefcep2]

Hi,

After reading a few posts about people skipping the addition of Oxy altogether, I had another go today...

I've tried using just the Creme Developer and I didn't see any of the 'blooming' I had when using the Oxy added. I did my first 'test-run' yesterday (and an A3000 mouse) and I ended up with some white spots on the buttons and an overall 'blotchy' or uneven removal of the yellowing...

Today I tried it (no Oxy this time) on an old VIC-1515 printer. I was using a 40vol (12%) Creme Developer and brushed it on with a small (about 1/2 inch across) artists brush, reapplying/rebrushing every 45-60 mins.

However I seem to have the same issue as yesterday, with uneven removal of the yellowing. The brush-marks of the initial application were still quite noticeable, even after 6 hours outside in the sun.

Do you have any other suggestions on what I could try for a more even finish?

Possibly diluting the Creme Developer with distilled water?

I've heard some people use a much weaker (3%) solution (plus Oxy) with good results.

I'd like to get it down pat before I risk the front-panel of my A3000! :-)

Cheers,

Mike.

Never had this patchy result and i used the 250 ml 12 % peroxide with a level teaspoon of oxy dissolved in a small amount of tap water, mixed it all up, which I then brushed on every 1-2 hrs as it dried out.  I wonder if the cheap oxy power is to blame?  You do not want anything with chlorine in it, I wonder if your "oxy" has chlorine in it?  I used Sards with Oxy and White King with oxy on different times, and no streaks or spots, whatsoever.  

There's an explanation on the chemistry as to why oxy is necessary on EAB.

[stefcep2]

Hmm...

I might try again with some of the proper Oxy stuff and also experiment with some 3% solution...

I'm using the recommended 40vol (12%) - is this too strong (30vol or LESS has been mentioned)?

This is not as magical a solution as I expected! :-/

Mike.

Its possible that it dried out for long enough in places, resulting in localised areas of very high peroxide concentrations and the patchy bloom.  Maybe rewetting/reapplying more frequently?  Several of us have applied 12% peroxide with a bit of oxy with a brush without streaking or blooming.
3% peoxide will take a very long time, according to the folks at EAB.