"The phone is a remarkably complex, simple device, and very rarely ever needs repairs, once you fix them." - Dan/Panther
Started by HarrySmith, February 18, 2011, 08:42:41 PM
Quote from: cloyd on May 11, 2015, 02:06:23 PMI have been reading this string with interest; I have a tenite ivory WE302 to de-yellow. I am a little confused. I was assuming that you put the treated phone in the sun for the heat. So, you are putting an OPAQUE peroxide paste on the phone and the UV rays from the sun speeds up the whitening? Perhaps it is the science teacher in me but has anyone tested this claim? Does the shady side get less whitening than the sunny side? If I am patient, can I get the same results indoors? If so, how long? Just wondering. Thank you for the clarifications.Tina Loyd
Quote from: WEBellSystemChristian on May 11, 2015, 07:39:11 PMI have no idea why, but UV rays really speed up the peroxide process. Use peroxide by itself and it defades very, very slowly. Use UV by itself, and it uses the reverse effect on the plastic!It has nothing to do with heat, just UV exposure.
Quote from: TelePlay on May 11, 2015, 09:40:01 PMOkay, I'll take a whack at a simple explanation of the process....So, without UV light, you don't get the strong oxidizing free radicals, and you don't get the desired affect.
Quote from: Brinybay on May 12, 2015, 12:27:58 AMMaybe that's why it took 4 or 5 treatments to get mine white.
Quote from: TelePlay on May 11, 2015, 09:40:01 PMonto 2 free hydroxyl radicals (2 OH-) H2O2 ---> +UV Light ---> 2 OH-
QuoteThe hydroxyl radicals are very strong oxidizers which in the presence of ABS plastic interact with the pi bonding to reverse the damage done to those bonds over time, damage which causes the plastic to absorb more light, to appear darker. The complex pi high orbital bonds are responsible for both absorbing and reflecting light. The free radical hydroxyl ions must restore the original plastic molecules surface bonds to what they were originally and the result appears to be a "bleaching" of the plastic, lightening it in color by reflecting more of the full spectrum light making it look lighter.So, without UV light, you don't get the strong oxidizing free radicals, and you don't get the desired affect.