---------------------- multipart/mixed attachment --Apple-Mail-14-327514143 On 3-jan-04, at 3:12, Richard Strang wrote: > Hello, list, > Once again, I learned a big lesson the very hard way, so I thought=20= > I'd > share my grief with you all. > I worked on an old player upright last night. It was a 1907=20 > variety, but > someone in California had rebuilt it very well. Why? Who knows? But it=20= > was > in very good shape, and close to pitch. > All the ivory keytops, the squares, were coming off. about 15 had=20= > been > off for quite some time, but the customer had saved them and gave them=20= > to me > to glue back on. I also gave a tug at all the rest that had not come=20= > off yet > and found that most of them were loose. I got out my trusty PVC-E glue=20= > and > proceeded to glue them all back on. > My big mistake? The glue paints on very white and pretty, and I=20 > took it > for granted that it would dry that way and would hide the finger=20 > prints and > other imperfections that were on the top of the keys that had not had = a > keytop on for a while. When I started taking the rubber bands off and > reinstalling the keys, I got a big surprise. PVC-E glue dries = perfectly > clear, leaving all imperfections glaring through the keytop which were=20= > all > very well glued on now. The job looks terrible, even though there are=20= > now > keytops installed which I'm sure feel very much better than the key = did > without the ivory. Even so, it is very obvious which keys had been=20 > bare for > a while. Should have I used another white glue, such as Titebond? I=20 > have > always stayed away from the regular white glues for keytops. Anyway, a=20= > word > to the wise. Don't do what I did. If you are going to use PVC-E glue=20= > for > ivory keytops, make sure the keytop surface is WHITE before gluing.=20 > Lesson > learned. > > Richard > Hello Richard, I am not an ivory specialist but I have found a neat way=20= of fixing this problem. Thanks to Susan Kline I make use of two different glues. One is the white glue for wood and the other is the CA glue, the one=20 that glues very fast and for ever. So what I do is this : First I clean the wood on which the ivory top had been glued with my=20 sharp little pen knife, because indeed the stains of dirty fingers will=20= shine through. I also make sure that the ends where the ivory heads and tails connect=20= are white again, although I am very careful not to scrape away ivory=20 and thereby damage the connection. I also carefully remove old glue from the ivory itself, again with my=20 little knife. I do not sand because that is too rough and uncontrolled. When I am sure that the surfaces are reasonably clean, I take from my=20 tool bag a small container with white glue and the CA glue. To spread=20 the glue I use a very thin wooden sateh stick of which I always have a=20= few in storage because I also use them for applying glue on shanks etc. With the sateh stick I very carefully apply a thin film of white glue=20 on the wooden surface of the key and also 'wet' the ivory connection=20 between head and tail. With the CA glue holder I apply thin drops on the ivory and try to=20 spread that out evenly too, also on the connecting side but very very=20 thin. Now I put the two together very precisely and press firmly for a minute=20= or so. That is enough, because the two glues have chemically bonded and the=20 ivory will probably never come off again and will look white and clean=20= as before. If the ivories have curled over time due to humidity changes, it is=20 another story because then you need key top clamps so the repair I=20 described above is an 'on the road repair'. Again thanks to Susan Kline who invented the bondage of CA glue and=20 white glue. friendly greetings from Andr=E9 Oorebeek --Apple-Mail-14-327514143 A non-text attachment was scrubbed... Name: not available Type: text/enriched Size: 3663 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/2e/e1/7c/5d/attachment.bin --Apple-Mail-14-327514143-- ---------------------- multipart/mixed attachment A non-text attachment was scrubbed... Name: foto krtje 2_2.jpg Type: image/jpeg Size: 26468 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/0f/c7/65/70/fotokrtje2_2.jpg ---------------------- multipart/mixed attachment --Apple-Mail-15-327514146 Amsterdam - The Netherlands 0031-20-6237357 0645-492389 www.concertpianoservice.nl --Apple-Mail-15-327514146 A non-text attachment was scrubbed... Name: not available Type: text/enriched Size: 92 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/10/52/41/72/attachment.bin --Apple-Mail-15-327514146-- ---------------------- multipart/mixed attachment--
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