At 8:10 AM -0700 7/22/02, Susan Kline wrote:
>>As for the shellac's ability to penetrate the felt mass, as mixed,
>>it had (SWAG) 25% of the viscosity of >>plastic/acetone, but it
>>flowed right into the shoulders even with a pre-existing plastic
>>content.
>
>Interesting question, how it gets past the plastic, since I don't
>think that pyralin will dissolve in alcohol >(will it?) There seems
>to be more to penetration than just the viscosity number.
Depends on how saturated the felt mass is. If all that's happened is
that the fibers have been coated, then there's nothing to prevent the
new stuff from flowing right through. If the resin has replaced
airspace, yes, then it's a physical barrier which can only be
overcome by the work of solvents, which you correctly point out are
different for each resin.
>Lots to find out.
I agree. At this point I'm less concerned with dry/cure time, than i
was back when I was trying to figure out whether shellac was going to
win the "quicker set-up than lacquer but more elastic than keytop"
prize. Both Dale Erwin and David Love have stated that for all
practical purposes, lacquer is ready to voice within an hour or two.
So dry/cure time is no longer an issue.
The important issue is the elasticity of the resin. For the time
being, I'm making my judgements on that acoustically, although I am
scheming of fashioning strips of these resins with identical
dimensions. So far I like that sound and behavior of shellac far more
than keytop.
>I have no idea what was happening with those "hissers" you found in
>the third visit, but I'm not sure that >cure time can be ruled out.
>If you let shellac get old enough and wet enough, it never does
>harden up.
In this case there was apparently an increase in the hardness between
the 8th and 11th days. But I'm willing to believe that it was
abnormal behavior. The 1# shellac dried nicely enough on a piece of
mirror.
>Hey! You have a good time! <glad>
On the program there this Thursday is a two piano version of Ravels'
La Valse, with the D and an M. (How's that for Mutt & Jeff go Pro
Wresting.....) The next night on a different stage is Stravinsky's
Concerto for Two Solo Pianos with a D and a C (no orchestra). I get
free ice cream and berries at intermission.
Bill Ballard RPT
NH Chapter, P.T.G.
"A man who tells the truth is bound to be found out sooner or later."
...........Uncle Harry in "The Tailor of Panama"
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