Removing key fronts

[John Ross]

I said what I MEANT.

In this area the term % is used, when I order it in the Drugstore. (Chemist 
for you)
Mind you I might be out in the exact %, it might have been 35%.
It does get confusing, doesn't it, the terminology difference between 
countries.

Also check out this site.

http://www.h2o2.com/intro/techdata.html

I had been replying specifically to
> I've tried soaking very yellow ones in hydrogen peroxide to whiten them
> up, and that worked pretty well, but required several prolonged soakings.
> So the next time, to speed it up, I tried Clorox, and that was too much -
> they came out over-bleached and chalky.  But maybe if it were diluted
> enough . . .(?)
> --David Nereson, RPT



John M. Ross
Windsor, Nova Scotia, Canada
jrpiano at win.eastlink.ca



----- Original Message ----- 
From: "John Delacour" <JD at Pianomaker.co.uk>
To: "Pianotech List" <pianotech at ptg.org
Sent: Thursday, August 02, 2007 5:18 AM
Subject: Re: Removing key fronts


> At 3:49 am -0300 2/8/07, John Ross wrote:
>
>>The hydrogen peroxide has to be the 30% stuff, not the 3% commonly 
>>available stuff.
>

> I think you mean 30 volumes and not 30%.  40 vol (12%) is the normal 
> recommendation but 60 vol (18%) is also obtainable at least in England.
>

>>Also it should be used in conjunction with sunlight.
>
> As I stressed also in my reply -- the key being ultraviolet rays.
>
> JD
>
>