keytops (Question)

[John Ross]

Hi Ron,
I just found where I got the reference to Pyralin, it
is what Schaff called ivorine, in their catalog 75-76.
I believe they stopped its useage because of it being
a fire hazard.
Having said that, it is quite possible, that I am
confusing it with the celluloid that you mentioned.
Regards,
Regards,
John M. Ross
Windsor, Nova Scotia, Canada
piano.tech@ns.sympatico.ca
----- Original Message -----
From: "Ron Nossaman" <RNossaman@KSCABLE.com>
To: <pianotech@ptg.org>
Sent: Monday, October 15, 2001 10:00 AM
Subject: Re: keytops (Question)


> >Hi Ric,
> >Sometimes the fronts are very thin, so heating does
> >not help, as the do not come off in one piece. The
> >other reason, is that heat frequently causes the
> >pyralin, (I think that's the name) to burst into
> >flame.
> >That is my two.
> >Regards.
> >John M. Ross
>
>
> Pyro what? They used to use celluloid for keytops
and fronts, as well as
> for combs, billiard balls, and any of the other
things folks with a
> formable plastic material can come up with.
Celluloid, being
> nitrocellulose, cellulose nitrate, or gun cotton, is
pretty good kindling
> for a fairly energetic fire. Smokes like crazy too.
> Ron N
>