how to clean the ivory key from yellow to white

[Isaac sur Noos]

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Hello, that is a new to me : hydrochloric acid. - never hear of such, is it
the same as chloridric acid ? if it is the same it is probably not adequate
(a mistake ?).

While bleach (hydrogen peroxide 30% vol or Perhydrol) works, could it be
better ?  If the pore opening and the grayish coloration that can occur if
too much exposure with  hydrogen peroxys ("eau oxygénée" in French) is
limited with hydrochloric acid, that should be nice.

Many good quality ivories are often back to a whiter state only with
sanding.

Nowadays you have to sand finely (400 - 600- 800)  the ivory after
application if you want them to buff well (even if you don't bleach it
sanding allow for a better buffing)

Sanding is easily done with an orbital sander laying on its side (care to
have a flat hard sanding plate or the angles will suffer).

To white an ivory is not good looking anyway I say what count is the veins
and the look and feel. I obtained some keys that where so nicely whitened
they look like ... plastic. so don't overdo that .

Best Regards.

                       Pianomania

                        Isaac OLEG
                        accordeur - reparateur - concert  19 rue Jules Ferry
                        94400 VITRY sur SEINE
                        oleg-i@noos.fr  tel:
                              fax:
                              mobile:  033 01 47 18 06 98
                              33 01 47 18 06 90
                              033 06 60 42 58 77







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  -----Message d'origine-----
  De : pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]De la
part de Peter Burns
  Envoyé : dimanche 9 novembre 2003 16:02
  À : Pianotech
  Objet : Re: how to clean the ivory key from yellow to white


  Greetings list, I'm with Dave Nereson on this one Ken.  Hydrochloric acid,
a flourescent strip light and lots of patience are needed to whiten ivory.
I use one strip bulb, which must be left on all the time including
overnight.  Arrange the keys underneath the light and apply the acid with
cotton wool several times a day.  It can take a week or two depending on how
yellow your keys are.
  When they are done, buff the key tops with a buffing wheel if possible, to
make them shine.  Do not get any acid on your skin, so wear gloves.  In the
UK you can only get the acid from a chemist, who will want some proof of
what it will be used for.  Good luck.

  ----- Original Message -----
    From: Ken Sin
    To: pianotech@ptg.org
    Sent: Sunday, November 09, 2003 7:06 AM
    Subject: re: how to clean the ivory key from yellow to white


    Hi  !

    I don't know how to make the ivory key from yellow to white ?

    anyone can help me !

    Thanks !!!

    Piano Tuner Student



    KenSin
    Piano Tuner


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