Hi Horace Ok, so its getting clearer. SO to be crysta,l are the hammers put upside down or crown down into a thinner solution bath and left submerged for 24 hours and then a fresh wash of stuff to hose down the entire set to wash the lac out after that? I'm curious. I learned from Jack Brand (during the Weickert felt trials) at Wurzen felt that wool fibers are hollow, which is why they can hold so much moisture. ie rugs, sweaters etc...... SO you see the lac. not only surrounds and stiffens the fibers on the outside but also on the inside. With the hammer acting as a sponge like device how successful is the lacquer extraction process. IE. 100 %...50%. T'would seem like it will be difficult to persuade the felt fibers to release the internal saturation of hollow fibers. Thoughts. war stories? Dale S. Erwin www.Erwinspiano.com Custom restoration Ronsen Piano hammers Join the Weickert felt Revolution 209-577-8397 209-985-0990 -----Original Message----- From: Horace Greeley <hgreeley at sonic.net> To: caut at ptg.org Sent: Sun, Feb 13, 2011 12:05 am Subject: Re: [CAUT] Bum set of NY hammers, I'm afraid Hi, At 09:32 PM 2/12/2011, you wrote: >Ok that makes a good deal more sense. I'll read to find out the >length or duration of soaking etc. As a rule of thumb, just think about how long it takes for whatever hardener to go into suspension to begin with. In terms of lacquer and lacquer sanding sealer, it's relatively quick...but, since the aromatics have flashed off, probably overnight will do in most cases. In terms of plastic/keytop and acetone, your guide would be whatever length of time it takes for that stuff to dissolve before it's used on the hammers to begin with. A couple of days? Three, maybe? OK...then, it's probably going to take something around that length of time for the plastic to begin to soften, let alone go back into suspension. (Hint: Your air compressor is your friend...and, of course, you'll be using a CALOSHA-safe nozzle....) Best. Horace >Dale S. Erwin >www.Erwinspiano.com >Custom restoration >Ronsen Piano hammers >Join the Weickert felt Revolution >209-577-8397 >209-985-0990 > > > > >-----Original Message----- >From: Fred Sturm <fssturm at unm.edu> >To: caut at ptg.org >Sent: Sat, Feb 12, 2011 8:55 pm >Subject: Re: [CAUT] Bum set of NY hammers, I'm afraid > >On Feb 12, 2011, at 5:39 PM, Dale Erwin wrote: > >>I'll have to read that and see how come you are more successful >>with this than I have been.... which is mostly not at all. > >Probably because it involves soaking, not just flushing with solvent >running down the hammer tail. The key is to leave the hammer felt in >a bath of solvent for a period of time, to give the solids time to >dissolve. I also use a mix of acetone and "lacquer thinner" >(whatever mix of things that might be) to cut the things most likely >to have been applied. A couple soaks, and the hammer is pretty close >to flushed, at least in my experience. >Regards, >Fred Sturm ><mailto:fssturm at unm.edu>fssturm at unm.edu >"The true sign of intelligence is not knowledge, but imagination." - Einstein > > > > >= -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/caut.php/attachments/20110213/5c1ed015/attachment.htm>
This PTG archive page provided courtesy of Moy Piano Service, LLC