Acetone will indeed eat a keytop. It is in acetone that I completely dissolve keytop material to make hammer hardening solution. It takes about 24 hours, but it does completely dissolve them. One other thing, many - if not most - nail polish removers now advertise that they have no acetone in them. People have objected to acetone in nail polish remover because it tends to also totally dissolve skin oil on contact. dp David M. Porritt, RPT dporritt at smu.edu<mailto:dporritt at smu.edu> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Terry Farrell Sent: Monday, April 05, 2010 2:42 PM To: pianotech at ptg.org Subject: Re: [pianotech] cleaning key tops Acetone is a common ingredient in lacquer thinner, which is a blend of several organic solvents. Acetone is generally less aggressive than lacquer thinner. Other than that, yes they are similar. I think you are probably correct that acetone will eat a plastic keytop - but perhaps more slowly than lacquer thinner. I meant by different beast that it was not the same thing. Terry Farrell On Apr 5, 2010, at 3:13 PM, tnrwim at aol.com<mailto:tnrwim at aol.com> wrote: I think nail polish remover is acetone. Different beast. Not really. I've used acetone as a substitute for lacquer thinner. In any case, it reacts the same on keytops as lacquer thinner. Wim -----Original Message----- From: Terry Farrell <mfarrel2 at tampabay.rr.com<mailto:mfarrel2 at tampabay.rr.com>> To: pianotech at ptg.org<mailto:pianotech at ptg.org> Sent: Mon, Apr 5, 2010 8:56 am Subject: Re: [pianotech] cleaning key tops I think nail polish remover is acetone. Different beast. Terry Farrell On Apr 5, 2010, at 2:27 PM, tnrwim at aol.com<mailto:tnrwim at aol.com> wrote: Marshall If the keytops are plastic. do NOT use nail polish remover. Nail polish remover is lacquer thinner, which eats up plastic. Unfortunately, there is nothing this customer can do to remove the magic marker. One of the ingredients in the ink is lacquer, The black ink has basically melted into the keytop material. While some of it can be removed with naphtha, there will always be a black residue inthe keytop. If the keytops are ivory you can use alcohol and/or lacquer thinner to remove the stain. But the longer you wait, the more that stuff will seep into the grain of the ivory, and it will be very difficult to remove the stain. Wim -----Original Message----- From: Marshall Gisondi <pianotune05 at hotmail.com<mailto:pianotune05 at hotmail.com>> To: pianotech at ptg.org<mailto:pianotech at ptg.org> Sent: Mon, Apr 5, 2010 4:39 am Subject: [pianotech] cleaning key tops Hi Everyone, I Hope you guys had a great Easter. I received an e-mail yesterday from a lady who said that her son put permenant marker on a key. They used toothe paste wit baking soda which I said might be too abrasvie. So what could be used to remove permanent marker without damaging a key top. I do not know if they are ivor or plastic. It's a Pratt & Read grand according to her. Thanks everyone Marshall Marshall Gisondi Piano Technician Marshall's Piano Service pianotune05 at hotmail.com<mailto:pianotune05 at hotmail.com> 215-510-9400 Graduate of The School of Piano Technology for the Blind www.pianotuningschool.org<http://www.pianotuningschool.org/> Vancouver, WA ________________________________ The New Busy is not the too busy. Combine all your e-mail accounts with Hotmail. Get busy.<http://www.windowslive.com/campaign/thenewbusy?tile=multiaccount&ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_4> = = -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100405/2a478204/attachment.htm>
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