De-yellowing

[Tothwolf]

On Sat, 22 Aug 2015, Dave G4UGM wrote:
> On Sat, 22 Aug 2015, Pete Turnbull wrote:
>> On 22/08/2015 13:50, Tothwolf wrote:
>>> On Sat, 22 Aug 2015, Dave G4UGM wrote:
>>>
>>>> All the techniques discussed so far involve using a "bleach" of some
>>>> kind and possibly UV light. Some use other materials so you have a
>>>> gell which makes it easier to apply.
>>>> From what I have read yellowing usually/often/always re-occurs..
>>>
>>> Hydrogen Peroxide, not bleach.
>>
>> Hydrogen peroxide *is* a bleach, as any chemist can tell you.  Never 
>> heard of "peroxide blonde"?
>
> I should probably have said a ""peroxide based bleaching agent" as most 
> folks assume "bleach" means "chlorine based bleach" which is not what is 
> being used here.
> However there are several variations on this theme and several slightly 
> different chemicals have been used as the bleach...

Exactly what I meant. Most will assume chlorine based bleach when someone 
mentions the term "bleach".