This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Hello Ric, The original formula to unglue old parts is the "3 A" : Alcohol, Water, Acetone (1/3 each) Alcohol is not doing much on the old hide glue, it is the water that does the job mostly, what acetone does in the mix I don't know (may be allow it to be less moistened ?). I was given that formula recently (from forte piano restorers in Italy) it seem very effective (not for vinyl glue). You have an interesting project ! I received an old Montal vertical from 1840 or so, totally destroyed, but I'll leave it as it is by now - have enough to do with a 1857 Erard grand . These actions had everything we find now in modern ones, with a very little modifications you even can regulate them perfectly. I'll send pictures soon of my Montal "bridge piano" a very nice case (I hate moths !) Best regards and good luck with your project Isaac OLEG -----Message d'origine----- De : pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]De la part de Richard Brekne Envoye : mercredi 3 decembre 2003 23:42 A : Pianotech Objet : Re: C.C.Lose Ok...grin... specific you want it eh ???.. I had this bottle of watter you see, and I had this bottle of 96 % alchohol... tho we call it Teknisk Sprit. Ethanol or Isopropanol... I'm not sure which I get as I'm getting it rather back door as it were. Anyways... I soak the cloth strips in water and lay them on the ribs, down the sides and tuck them tight in against the sides where they join with the panel. After soaking for an hour or so, I use a small syringe to feed the alcohol into the join. After making sure all cloths are good and wet I cover with plastic and let sit for 24 hours. Then its a small steam iron to warm up the ribs... keeping the cloths faily wet. The joints simply fall apart clean. I can even clean off any remaining glue with the now hot and wet cloth strip I just removed. Seems to me like it would be easy enough to expand on this basic set up to remove any soundboard, and any ribs as long as some form of hide glue was used... for anyone needing / wanting to save the old soundboard. I'll start putting things together again as soon as I get some new ribs manufactured with a 90' crown radius. They will be same width, pretty much same height, tho the origionals were thinned pretty radically in the bass bridge area of the panel....so I'll allow them to be a bit thicker there me thinks. Yeah... I'm very curious as to how this will sound as well. Changing the rib pattern, and rib crowning a 200 year old square. Blasphemy I suppose... but I would like to think the darn thing wont cave in again. Cheers RicB Farrell wrote: Richard, I guess I'm an whoeverelse. You said: "Strips are soaked in water and 96 % tech spirits." How much water and how much 96% tech spirits? Or is it 4% water and 96% tech spirits? BTW, what are "tech spirits", or "96% tech spirits"? Looks like you did an excellent job. It'll be real interesting to see how things turn out. Terry Farrell -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway mailto:rbrekne@broadpark.no <mailto:rbrekne@broadpark.no> http://home.broadpark.no/~rbrekne/ricmain.html <http://home.broadpark.no/~rbrekne/ricmain.html> http://www.hf.uib.no/grieg/personer/cv_RB.html <http://www.hf.uib.no/grieg/personer/cv_RB.html> ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/01/c4/1c/90/attachment.htm ---------------------- multipart/alternative attachment--
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