[CAUT] ca more or less

[lafargue@bellsouth.net]

I think it's hard to use too much, too, but I suppose it can be done.
Once I thought the block was absorbing it and really it was just running
along the top of the block and eventually puddled and began pouring out
at one location.  That was interesting. But it was the only time I had a
problem.  Also, I am thinking that once a small amount is used, the
block won't absorb and swell as much when a second application is tried.
The pours are sealed.  

Also, pulling the plate out of a piano that has been treated heavily is
difficult.  Sometimes it takes a serious hit or prying to release the
plate from the block as you are hoisting and of course you risk damaging
the plate or maybe rim, I suppose.   

Lance Lafargue, RPT
LAFARGUE PIANOS, LTD
New Orleans Chapter, PTG
985.72P.IANO
lafargue@bellsouth.net
www.lafarguepianos.com
 
 

> -----Original Message-----
> From: caut-bounces@ptg.org [mailto:caut-bounces@ptg.org] On Behalf Of
Don
> Sent: Wednesday, October 05, 2005 10:59 PM
> To: caut@ptg.org
> Subject: [CAUT] ca more or less
> 
> Hi Susan,
> 
> I find it hard to believe that too much CA glue can be
> used. This is a repair that I often suggest my rural
> clients do "all by themselves". Cost to them--the glue
> and some labor. Cost to me? A boiler plated email and
> the time to send it.
> 
> One family misinterpreted my directions and used 12
> ounces of glue. I went in with fear and trepidation in
> my heart--but the piano was *just fine*.
> 
> At 07:06 AM 10/5/2005 -0400, you wrote:
> >Thanks, Les, that's very interesting. So, your spot
> repairs on the old
> >upright worked just fine (exactly my experience, spot
> repairs on very
> >old pinblocks), but turning the piano over and
> flooding from the back
> >of the pinblock didn't. What was the trouble on the
> delignit? Didn't
> >soak in? For that matter, why did a delignit pinblock
> go bad? Certainly
> >not an old block. Simple looseness, or do you think
> there was delamination?
> >
> >The more I hear about and think about putting the CA
> into an inverted
> >pinblock, the less I like the idea. On pianotech, we
> talked about the
> >possibility of having a ring of CA form just past the
> end of the tuning
> >pin, preventing it from proceeding further into the
> block if one wanted
> >to tune it sharper. (I wonder if this is how the
> "tight pins got looser"?
> >That the pin couldn't proceed further into the
> block.)
> >
> >When I picture how a loose pin is moving, I imagine
> it being
> >held reasonably well at the base, but flagpoling at
> the top,
> >pulled by the wire. If you think of a hole with a
> tuning pin
> >in it, being pulled by a high tension wire, don't you
> think of the top
> >of the hole enlarging more than the bottom? If so,
> putting the glue
> >into the bottom is probably a mistake. The pin itself
> might keep the
> >glue from migrating to the very top of the pinblock,
> which is the part
> >most likely to be egged out.
> >
> >Well, that's my mental picture of what's happening.
> >
> >In all the recent discussions about CA in pinblocks,
> at least 40 or
> >50 posts, I can't think of a single one (except mine,
> maybe) which talked
> >about the process by which people _decided_ to put as
> much glue into
> >the pinblock as possible. Has anyone TRIED using
> less? If not, why not?
> >Why did so many people start doing this procedure in
> basically the
> >same way, without considering whether it might be a
> good way or not?
> >When I hear of ounces and ounces poured on from the
> rear, presumably
> >because the block will trap more of it from that
> direction, I wonder
> >whether this is a semi-automatic conversion from the
> old pin tightener
> >days, when we'd treat all the pins, and get as much
> in as possible.
> >No one thought of the differences in the materials,
> and the possibility
> >that less CA might work better, and the issue that CA
> in bulk is very
> >toxic, and we're often using it in people's homes?
> >
> >sssssssnn
> 
> Regards,
> Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T.
> 3004 Grant Rd, Regina, SK, S4S 5G7
> Tuner for the Saskatchewan Centre of the Arts
> 
> http://us.geocities.com/drpt1948/
> 
> 
> 
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