Hi, Patrick. What you say is all true regarding Ivorite. However, I think Ivorite came until after the 70's had gone. The discoloration Yamaha calls Ivoritis, for anyone who hasn't seen it, is more like graying, looking as if the keys had been played with black greasy fingers, or some kind of tarnish. Yellowing sounds like a different process, more likely the more common aging. As far as I know, it's only Ivoritis that warrants replacement keytops. One thing to note is, some of the early replacement sets _themselves_ later suffered from Ivoritis, and so occasionally Yamaha will replace such a set a second time. -Mark Schecter J Patrick Draine wrote: > Terry, > While you'll find that Yamaha is very generous in their policy on > replacing Ivorite keyboards that have become discolored due to hand > oils reacting with the first generation formulation of Ivorite (which > has a grain which emuates ivory and is semiporous), I don't think they > go so far as to replace yellowed plastic tops or fronts. > Patrick Draine > > On 7/24/06, Farrell <mfarrel2 at tampabay.rr.com> wrote: >> >> >> A common problem with some older (1970s) Yamaha pianos is that the >> plastic >> fronts of the keys would turn yellow. I think I remember something about >> Yamaha replacing these for free? Maybe? Maybe not? Anyone know what the >> situation is and/or who to contact at Yamaha about this? >> >> Thanks. >> >> Terry Farrell >
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