how to clean the ivory key from yellow to white

[gordon stelter]

Really? HCl, not hydrogen peroxide???
     Thump

--- Peter Burns <peter-burns.pianotuner@tesco.net>
wrote:
> Greetings list, I'm with Dave Nereson on this one
> Ken.  Hydrochloric acid, a flourescent strip light
> and lots of patience are needed to whiten ivory.  I
> use one strip bulb, which must be left on all the
> time including overnight.  Arrange the keys
> underneath the light and apply the acid with cotton
> wool several times a day.  It can take a week or two
> depending on how yellow your keys are.
> When they are done, buff the key tops with a buffing
> wheel if possible, to make them shine.  Do not get
> any acid on your skin, so wear gloves.  In the UK
> you can only get the acid from a chemist, who will
> want some proof of what it will be used for.  Good
> luck.  
> 
> ----- Original Message ----- 
>   From: Ken Sin 
>   To: pianotech@ptg.org 
>   Sent: Sunday, November 09, 2003 7:06 AM
>   Subject: re: how to clean the ivory key from
> yellow to white 
> 
> 
>   Hi  ! 
> 
>   I don't know how to make the ivory key from yellow
> to white ?
> 
>   anyone can help me !
> 
>   Thanks !!!
> 
>   Piano Tuner Student 
> 
> 
> 
>   KenSin 
>   Piano Tuner
> 
> 
>
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