Unfortunately, the archives are not available until all the details of transferring to the new server are worked out. Hopefully it won't be too long! --- On Sun, 12/28/08, erwinspiano at aol.com <erwinspiano at aol.com> wrote: > From: erwinspiano at aol.com <erwinspiano at aol.com> > Subject: Re: [pianotech] Guidance on Pressure Ridges and Cracks > To: lmha60 at yahoo.com, pianotech at ptg.org > Date: Sunday, December 28, 2008, 4:04 PM > ? Hi Lyn > ? This list has discussed this one issue perhaps more than > any other as well as related techniques to soundboard > construction. Check our archives under these titles & > see what comes up. You should be busy reading for many > weeks. grin. The short version is..... that pressure rdges > are a bi-product of an old school soundboard making > method?called compression which exceeds the elastic limit of > the wood under a compressive force. The cracks come later > (usually)after years of climate cycling. > ? Dale Erwin > ?WWW.Erwinspiano.com > > > > > > > Dear PTG, > > I inquired recently on pressure ridges and cracks with > respect to piano > soundboards. I have received some very valuable > information, but I would > like to investigate the differences between the two further > and also be able > to understand the mechanics of both. I have found more > information on the > internet about pressure ridges being caused from mistakes > made by the > manufacturer during the dying process. > > My specific question: Is there a book the PTG recommends > that discusses > pressure ridges and cracks of piano soundboards? > > I have Arthur Reblitzes book on servicing, tuning and > rebuilding and Larry > Fine's book called the Piano Book and neither of them > discuss the > information I am looking for. > > Thank you for your time. > > Lynn Michael Hall -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech_ptg.org/attachments/20081228/95fb8195/attachment.html>
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