[pianotech] restoration

[David Ilvedson]

I'd remove some cupping but not go crazy.   John, you should start working on your YouTube videos...

David Ilvedson, RPT
Pacifica, CA  94044

----- Original message ----------------------------------------
From: "John Delacour" <JD at Pianomaker.co.uk>
To: pianotech at ptg.org
Received: 4/22/2010 9:10:18 AM
Subject: Re: [pianotech] restoration


>At 06:40 -0400 22/4/10, Marcel Carey wrote:

>>I'm sorry, but I have to disagree with you about the prior sanding 
>>of the ivories. If you look carefully at the beginning of the 
>>sanding video, you can see that the ivory is worn in the middle. I 
>>think the first sanding was mostly to flatten the ivories. The 
>>peroxide alome might have whiten the ivories, but sometimes you 
>>really have to sand them flat in order to do a more even key level 
>>and consistent feel from one key to the next.

>I prefer to to remove no ivory even if the keys are cupped.  I did a 
>BlŸthner overstrung last month that had very grubby and very worn 
>keys. The keyboard now looks very respectable and I shall have to 
>tell any prospective customer that the keys are not as good as they 
>look,  If I'd sanded them level they'd be about 1/2 a millimetre 
>thick.

>>But I do like your idea of polishing the ivories by hand to make 
>>them feel better. What kind of chalk are you using?

>Just ordinary powdered chalk (CaCo3) that you can buy at any builders 
>merchant's. They sometimes call it line chank (for plumb lines) and 
>it's also known as whitening or whiting.

>JD
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