Have found that here in Canada on spinets, but don't recall the yellow color. Also, found similar stuff on accordion bass machines, made in Germany . Often wondered what atmospheric condition produced this . Thought it might have been humidity. Carl / Winnipeg David Nereson wrote: > I've seen that many times also. I'm sure it's the result of a > chemical reaction with the air or maybe with some polish or > mothproofing that was put on at the factory or who knows what. > Sometimes dissimilar metals cause deposits to form, either from > corrosion or electrolysis, but I'm not a chemist. I doubt it's > harmful dust, just sitting there, but I wouldn't breathe it in. > --David Nereson, RPT > > -----Original Message----- > From: pianotech-bounces at ptg.org > [mailto:pianotech-bounces at ptg.org]On Behalf Of holly quigley > Sent: Wednesday, September 27, 2006 10:22 AM > To: pianotech at ptg.org > Subject: hello and ? re weird bright yellow fuzz on pressure bar > > > Hi everyone! > > Been an associate member for a while, I work as a tuner/technician > full-time in GA... just usually too busy to keep up with the > mailing list. Was actually once on here, but deleted my email > account and can't find my old password - d'oh! > > Anyway, I just have a really quick question - I've searched the > archives and even google, and no luck. > > For the second time now in the past month, I have come across a > spinet (two separate ones in the past month), with a layer of this > weird almost neon-yellowish-greenish fuzz/dust coating the > pressure bars. The screws for the pressure bars are completely > clean and untouched - it looks like it has to be either some weird > chemical reaction, a fungus or mold (but on plain metal like that > - ??) or Idunno - was there ever a time when pressure bars were > coated in some kind of faux suede or something that would break > down? It actually looks almost like school-issued yellow chalk > coating them, but it's an even layer over the entire bar, and as I > said, the screws have none of this stuff on them. I'm a little > concerned because when you just barely touch this stuff the powder > just showers right off of it. I didn't have a mask or gloves at > the time, and I hope I don't have to worry about being exposed to > some kind of poisonous chemical residue resulting from a reaction > between the pressure bars and something in the air. The two pianos > appeared to be different makes - the one today was a Mehler & Sons > (I think - I might be screwing the name up), and the other was a > Mendelssohn spinet, both about 30+ years old. > > Does this sound at all familiar to anyone? In this case, I'd be > more than happy to wind up sounding like a complete newbie dolt > who didn't recognize something completely harmless and common... > > Thanks in advance! > -Holly Quigley > -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20061107/ef1fc182/attachment.html
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