Photo: RF._.studio

How do you reverse yellowing plastic?

Coat your yellowed plastic gadget and wrap it. In a nutshell, all you need to do is to coat the plastic (cleaned and dried, of course) evenly with the cream peroxide. Avoid having the cream coming in contact with your skin or eyes, as it can cause burns.

hardwarezone.com.sg - Learn: How to whiten your yellowed plastic gadgets - Hardwarezone

What age determines your music taste?

Preferences may change over time, but research shows that people tend to be especially fond of music from their adolescent years and recall music...

Last updated Jan 19, 2021

What to do if your child refuses to go to time-out?

What If My Child Refuses to Go to Time-Out? Present a choice. He can cooperate or lose a privilege, such as screen time. ... Offer time off for...

Last updated Nov 8, 2020

Promotion

Learn: How to whiten your yellowed plastic gadgets

Note: This article was first published on 9 April 2018 and it's republished now because most of us are staying at home and have time to do these kinds of things. Best of luck in restoring your old gadgets!

Make yellowed plastic gadgets white again!

A couple of weeks ago, I received a 20-plus years old Apple Extended Keyboard (AEK). Meticulously, I stripped the keyboard to dust down the PCB within, and to clean the two halves of the casing and the keycaps. Despite getting a super-clean keyboard after all that hard work, I was unsatisfied with what laid before my eyes. What was wrong? Well, with the exception of the keys, the casing of the keyboard (along with the space bar) had yellowed considerably. Now, this is nothing surprising; we all have plastics that had yellowed with age. Keyboards, mice, printers, gaming consoles - you name it. And no matter how you scrub it, you just can’t get back its original color. Determined to return my AEK to its former glory (and color), I searched the Internet for a method to ‘de-yellow’ plastics. It turned out that there’s really a way to undo the damage, and the answer has been out there for more than three years. It’s called Retr0Bright. To shorten the chemistry lesson, essentially, the industrious folks behind the Retr0Bright project had discovered that it’s the bromine - often used as flame retardant in plastics - that’s causing the yellowing. And the keys to reverse the process are hydrogen peroxide and ultraviolet (UV) light. For those adventurous enough, the Retr0Bright wiki has recipes for making the RetroBright gel. Why gel? Because hydrogen peroxide isn’t exactly cheap. For instance, a 50ml bottle of hydrogen peroxide solution (12% strength) costs S$4.90. Imagine the amount you’d need, and how much it’d cost you if you want to de-yellow a large item, like a PC casing. Then again, if only making the Retr0Bright gel is as easy as pie. If you’ve never heard of hydrogen peroxide before this, it’s unlikely that you’d know what is xanthan gum or glycerine, two other ingredients for making the gel. In addition, getting the mixture exactly right sounds difficult.

Is a 440 above middle C?

A440 (also known as Stuttgart pitch) is the musical pitch corresponding to an audio frequency of 440 Hz, which serves as a tuning standard for the...

Last updated Oct 31, 2020

How many times a week should I take music lessons?

When it comes to taking music lessons, it's most common for students to take one lesson per week. While weekly lessons work perfectly fine for...

Last updated Dec 26, 2018

Promotion

While looking for a ready-made peroxide gel, I chanced upon a post in the English Amiga Board, where a member recounted his success with an off-the-shelf cream peroxide product. Many others had also reported success, so I decided to give it a try. In short, yes, it really works.

And here's how you can do it too:

1.) Get the Jerome Russell Bblonde Cream Peroxide

The magic potion that you need is the Jerome Russell Bblonde cream peroxide (40 Vol 12%) that’s originally intended for bleaching hair. A 75ml bottle costs US$1.50 on Amazon, excluding shipping. I reckon a lower strength (6% or 9%) will work just as well, except that it will take you a longer time. Locally, this looks to be a similar product, but I’ve not tried it - so use it at your own risk.

2.) Coat your yellowed plastic gadget and wrap it

In a nutshell, all you need to do is to coat the plastic (cleaned and dried, of course) evenly with the cream peroxide. Avoid having the cream coming in contact with your skin or eyes, as it can cause burns. As such, I strongly recommend that you use gloves. And while you're at the handy man store, pick up a brush and some cling wrap too. The idea is to wrap the coated plastic parts, so that the cream peroxide doesn't dry up too fast. I've more tips towards the end of this article.

3.) Sun it, or use shine it with a UV lamp

UV light plays an important role in the whitening process. So, don't go and lock the treated parts in your cupboard. There's no lack of UV light in sunny Singapore - all I did was to leave them on a table by the window. Alternatively, put the parts under a UV lamp. Remember to check the progress regularly. This sunning process can take as short as a few hours to as long as a few days, depending on how severe the yellowing is. Once the plastic has regained the color that you wanted, wash the parts thoroughly, and ensure that no residual cream remains.

What scales did Bill Evans use?

Regardless of whether you prefer to think of the tune in B♭ Major or G minor, the parent scale that Bill Evans uses for much of his solo is B♭...

Last updated Jun 17, 2020

Why is C minor so sad?

The tonic (C) is the strongest note and draws more of our attention, so minor chords like this trigger more sensory dissonance, a kind of tension...

Last updated Jan 31, 2018

Join almost HALF A MILLION Happy Students Worldwide

Promotion

Caveats (and some tips)

First and foremost, there's no guarantee that this cream peroxide method will work on all yellowed plastics. So, think it through long and hard before attempting this on your vintage, only-one-left-in-the-world gadget. If you do try it, remember to never let the cream peroxide dry up, especially under the hot sun. It will cause an ugly bleaching effect that unfortunately isn't reversible (and I've learned this the hard way). This is why I now leave the parts on a table beside the window. I would also check on them and turn them regularly, so that all the sides are exposed to the sunlight. Remember, what's required is the UV light, and not the heat. If it's impractical for you to keep checking on the progress, consider using a UV lamp. Update: A reader (see comment below) suggested not covering the area being treated with a plastic sheet, as this may result in the streaking effect. Thanks for the tip! Last but not least, the Retr0Bright wiki has a page that talks about other problems and pitfalls - it's a must read for anyone who is thinking of having a go at restoring their yellowed gadgets. Note: This article was first published on 1st July 2012, but republished several times thereafter for its relevance.

hardwarezone.com.sg - Learn: How to whiten your yellowed plastic gadgets - Hardwarezone

Who is the greatest blues singer of all time?

The Most Famous Blues Singers of all Time Muddy Waters. ... Ma Rainey (1886) ... Sister Rosetta Tharpe (1915) ... Mamie Smith (1891) ... Ray...

Last updated Jan 6, 2022

Is it illegal to copy music?

Making unauthorized copies of copyrighted music recordings is against the law and may subject you to civil and criminal liability. A civil lawsuit...

Last updated Jan 22, 2022

Promotion

Is alcohol good for cleaning keyboards?

Can you Clean a Keyboard with Alcohol? You can use isopropyl/rubbing alcohol to clean the extra sticky and messy parts of your keyboard. Alcohol is...

Last updated Feb 22, 2022

Promotion

Can major keys sound sad?

The answer is A RESOUNDING YES. One could even say a major key can sound more depressing than a minor key. Mar 2, 2022

Last updated Dec 2, 2020