graphite

[Isaac OLEG SIMANOT]

David,

If you want good really graphite pencil take the Renner one.

At last the ones they sell in Europe is very efficient.

I tried different pencils but none where exactly as graphite sticks. And
yes, talc is better under the key frame.

Isaac OLEG



> -----Message d'origine-----
> De : owner-pianotech@ptg.org [mailto:owner-pianotech@ptg.org]De la part
> de Dave Nereson
> Envoyé : jeudi 14 février 2002 02:15
> À : pianotech@ptg.org
> Objet : graphite
>
>
>     On this graphite thing -- everybody talks about it like it's
> anthrax or
> something, but I don't find the stuff all that offensive.  Not powdered
> graphite, anyhow.  Graphite grease, yes -- that stuff is nasty because it
> collects dust and gums up, slowing things down, rather than lubricating.
> Technicians used it quite a bit in decades past and is now a no-no.  (I
> think that's the most commonly found gunk in repetition lever spring slots
> of older grands).
>     But the powdered graphite I don't see as all that bad a
> substance, other
> than being difficult to wipe off your fingers.  Isn't that what piano
> manufacturers used to put on the tops and tenders of jacks, on top of
> repetition levers, on sliding surfaces like the hardwood plugs under the
> glide bolts of grand actions and on the side of the action frame where it
> contacts the shift return spring,  and sometimes on dags and the back edge
> of the back rail, and in certain spring grooves, and sometimes on sliding
> surfaces of wooden trapwork levers, etc.??
>     I don't use it much, except occasionally under the glide bolts if they
> squeak when using the soft pedal (una corda).  And on upright
> damper levers,
> I'll pop the spring out, polish it, brush the felt clean with a
> toothbrush,
> then lube the slot with pencil lead, which is essentially graphite, I
> believe.  I mean, as long as it's not graphite grease, and you don't lick
> your fingers to dispose of the excess, what's wrong with
>     --David Nereson, RPT, Denver
>
>