[pianotech] Re-Attaching Ivory head

[Gerald Groot]

I agree, contact cement does tend to discolor, bleed through, the ivory
turning it white.

Jer

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Al Guecia/Allied PianoCraft
Sent: Sunday, March 06, 2011 11:11 AM
To: Mike Kurta; pianotech at ptg.org
Subject: Re: [pianotech] Re-Attaching Ivory head

 

Yes it does adhere well, but the trouble that I find with contact cement is
that it changes the color of the ivory. It no longer matches the neighbors.
I find that the PVC & CA does not change the color of the ivory. If the
ivories are yellow to start, it doesn't make much difference, but when they
are nice and white or have been bleached, I'm not happy with the results. 

 

Al -

High Point, NC

 

 

 

On Mar 5, 2011, at 9:29 AM, Mike Kurta wrote:





    Les:

    Go to your local home center and buy a small can of DAP Gel contact
cement.  The red can, NOT the green can.  Clean the top of the key and the
bottom of the ivory of any old adhesive.  Spread a light coat of gel with
your finger or a Q-tip or small brush.  Let both surfaces dry until they are
no longer glossy. 10-15 minutes should do it.   Carefully place the ivories
in position and apply momentary pressure.  DONE!  No waiting for drying
time, no clamping, they're ready to go and get tighter with the passage of
time. 

    If you don't need a pint can, as an alternative I have also used contact
cement that comes in a squeeze tube.  Its more liquidy but works as well.
Ace hardware carries their own brand, I carry a tube in my tuning case for
occasions such as yours.  

    I know I'll get a lot of flack for this suggestion, but I've done this
for 20 years and not had one come loose yet.   

    Mike Kurta, RPT

    N. Michigan chapter

 

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