Actually it's mutton tallow which is basically rendered lamb fat. David Love ----- Original Message ----- From: "Tom Servinsky" <tompiano@gate.net> To: <pianotech@ptg.org> Sent: September 20, 2001 8:01 PM Subject: Re: too stiff > Z, > It is my understanding that your hypothesis is probably correct: felt was > impregnated or dipped in Mutton talc ( I think that's the spelling of > it....). I had this same conversation with one of the felt manufacturers > several years ago, trying to understand why verdigris had the enviorment to > grow in the first place. > According to the manufacturer, it's not simply the felt/brass interaction as > it's the additive that the felt was dipped into which caused the problems. > The additive acted as the catalyst to react with the brass which caused the > verdigris. > Once the practice of impregnating the felt was stopped, so stopped the > verdigris. > One last note....with regards to the heat gun, have you ever seriously given > the flanges of good heating with the heat gun. Keeping the gun moving you > can continue to heat the parts to an increasing hot level without burning > the wood. I'm not sure if it's the verdigris which has a strong volatility > or maybe it's the years of center pin solutions in the flange, but with an > intense heating of the flanges a blue ploom of smoke will poof up. After the > smoke occurs the flanges become extremely free and the verdigris appears to > be less noticeable. My experience with this treatment has demonstrate rated > that verdigris can burned off off temporarily ( enough) to have relatively > predictable flange correction for about a year. Followed by a dose of > Protek actions can remain useable. > Tom Servinsky,RPT > ----- Original Message ----- > From: "Z! Reinhardt" <diskladame@provide.net> > To: <pianotech@ptg.org> > Sent: Thursday, September 20, 2001 10:24 AM > Subject: Re: too stiff > > > > I suspect that the entire action parts (whippens, shanks/flanges) were > > dipped into a solution before installing on the rails. If that is the > case, > > I should think when only the bushings are replaced, it is only a matter of > > time before that stuff in the wood leaches into the new bushings to > produce > > the old problems. > > > > Last year I came to a Steinway L that was well loaded with verdigris. The > > wood in the action parts didn't feel as dry as I might expect for older, > > possibly brittle parts. It was one of those rare days when I had my heat > > gun with me, so I removed a hammer, and passed the flange very briefly in > > front of the heat gun. Indeed, it looked wet all over, if only for an > > instant. So, I hit it a little harder with the heat, and nothing would > > evaporate. Oh well ... but it does explain why replacing just the > bushings > > is not a permanent fix. > > > > Z! Reinhardt RPT > > Ann Arbor MI > > diskladame@provide.net > > > > ----- Original Message ----- > > From: "David Love" <davidlovepianos@earthlink.net> > > To: <pianotech@ptg.org> > > Sent: Wednesday, September 19, 2001 11:23 PM > > Subject: Re: too stiff > > > > > > Dale: > > > > Why wouldn't rebushing work? The verdigris, in my experience doesn't > > permeate the wood surrounding it. The question there is whether or not it > > is a practical solution. My answer has generally been no. > > > > David Love > > > > ----- Original Message ----- > > From: "Erwinpiano" <Erwinpiano@email.msn.com> > > To: <pianotech@ptg.org> > > Sent: September 19, 2001 8:10 PM > > Subject: Re: too stiff > > > > > > > Dear List > > > Nothing works for verdigris long term. Not protek ,not rebushing, not > > > shrinking, silicine oil,not mineral oil ,snake oil or 30 weight motor > oil. > > > Been down that dead end road. Temporary solutions at best. > > > > > > Dale Erwin > > > > > > > >
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