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List
There are different kinds of plastics that yield decidedly
different results. For example I have used clear plexiglass in an acetone
solution for years on Isaac,Ronsen and Steinway hammers. The plexiglass is
not nasty and unforgiving as the keytop/ acetone solution is and frankly
almost never use it. As you said David keytop/acetone it is not for building
tone it's for quick evening out of tone usually in concert situations. Iwould
not recommend plexiglass for building tone in the steinway hammer either. But
would use it to even things out.
In fact If a hammer tends to be notoriously soft as many stwy hammers (and
others) are the best tone building solution is an appropriately dilute
solution of sanding sealer or clear laquer. Plexiglass will adequately build
tone in hammers that are closer to what most of us would call acceptable tone
without the danger of ruining or over polluting the hammer.
The whole idea of voicing is control over felt stiffness appropriate for
the impedance characteristics a particular soundboard system .
Dale Erwin
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