Acrylique lacquer history

[Isaac sur Noos]

Hello,

I like to know when the first water based (acryl based) lacquers have
been employed.

A search on Goggle gives me a site where the plastic polymers where
developed since 1862 for cellulose & celluloid, 1909 for bakelite ,
but polystyrene , acryl polymers  and vinyl polychorure PVA ?), have
been developed since the 30's (Nylon : 1928) polyurethane's (P.U) ,
polyester and epoxy beginning in the 40's.

Id like to understand the chances of US made pianos (1940 )to be using
water based lacquer for soundboards.

Does someone have this information , I also like to understand what
should mean "DD based lacquer" (talking about a Bosendorfer grand from
the 70's)

Who is using water based lacquer on soundboard, what are the results,
is the film hard and thin ?

Thanks to all chemical minded people.

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


> -----Message d'origine-----
> De : pianotech-bounces@ptg.org
> [mailto:pianotech-bounces@ptg.org]De la
> part de Richard Brekne
> Envoye : mardi 11 novembre 2003 09:09
> A : Pianotech
> Objet : Re: Steel/Jig Strength
>
>
> Grin....
>
> >
> > .... A little less worrying about the propriety of an
> exalted highly
> > skilled and professional piano technician dumpster
> diving, and a little
> > more appreciation of both getting a good deal and
> recycling an otherwise
> > shamefully wasted resource to good effect, and we'd all
> be that much ahead.
> >
>
> Sounds to me like a great argument for recycling old soundboard
> material.
>
> FWIW
>
> RicB
>
> --
> Richard Brekne
> RPT, N.P.T.F.
> UiB, Bergen, Norway
> mailto:rbrekne@broadpark.no
> http://home.broadpark.no/~rbrekne/ricmain.html
> http://www.hf.uib.no/grieg/personer/cv_RB.html
> _______________________________________________
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>