? 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/a0a894c4/attachment.html>
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