"The phone is a remarkably complex, simple device, and very rarely ever needs repairs, once you fix them." - Dan/Panther
Started by markosjal, August 10, 2018, 04:07:24 PM
Quote from: markosjal on August 10, 2018, 09:19:30 PMVol 40 developer - peroxide?Film developer?with peroxide?
Quote from: RotarDad on August 10, 2018, 06:06:42 PMJohn - Thanks for the continued sharing of your restoration processes! I have a light gray 500 where the cord is darkened some also. I'm guessing your peroxide treatment would work well on most light colors, and I'll have to try it on the light gray.I wonder how permanent the improvement will be. I did a full peroxide treatment a few years back on a really-nice white ABS 500 that had significantly yellowed. I took it back out of the storage box a couple years later and realized the bright white had darkened somewhat again. It was still much better than as-found, but a more creamy hue was noticeable.
QuoteThe Clairol Pure White Developer 30 Volume has a shelf life of 3 years. Volume refers to the percentage of peroxide in the creme solution. You find 20, 30 and 40 volume developers and they are increasing concentrations of peroxide. 20vol is 6% peroxide, 30 vol is 9% peroxide and 40 vol is 12%. This comes from a hair salon site. They explain it with respect to lightening hair, or in other words, the Volume number to them describes how many 'levels' of lightening that will be achieved with the developer: 20vol is around 2 levels of lightness; 30vol is around 3-4 levels of lightness; and 40vol is around 6 levels of lightness.