I've seen a number of these, at least prior to 1920 that didn't use wafers or linen. From what I can tell, they didn't even use whiting (titanium dioxide) mixed with the glue, which I'm assuming is good ol' hot hide. I always try and glue them back they way they were originally to achieve the best color match. - Mark -----Original Message----- From: Allen Wright [mailto:awright440@cinci.rr.com] Sent: Tuesday, October 21, 2003 12:48 PM To: davidlovepianos@earthlink.net; Pianotech Subject: Re: old Steinway ivories David, But wouldn't I be able to see evidence of the layer of cloth under the tops that are still on (viewed from the side)? Maybe not. I'm used to seeing at least part of the cloth (if not all of it) left behind on the key when the tops have fallen off. But in your scenario, then, the cloth must have stayed on the bottom of the ivories when they came off? Thanks, David. Allen Wright ---------- >From: David Love <davidlovepianos@earthlink.net> >To: Pianotech <pianotech@ptg.org> >Subject: RE: old Steinway ivories >Date: Tue, Oct 21, 2003, 10:47 AM > > The technique did involve using linen (more like cheesecloth). The linen > functions to accommodate the different rates of expansion between the ivory > and the wood. The lines you see are a texturing of the glue. Usually, a > layer of glue was laid down, then the linen was put over, then another > layer of glue. It was allowed to dry and the excess was trimmed. The > ivory was then laid down and a hot caul was clamped on top to activate the > glue. The wood insert you see covers the bottom (or top) of the mortise. > > David Love > davidlovepianos@earthlink.net > > >> [Original Message] >> From: Allen Wright <awright440@cinci.rr.com> >> To: <pianotech@ptg.org> >> Date: 10/21/2003 7:07:22 AM >> Subject: old Steinway ivories >> >> List, >> >> I've taken on a job of replacing a dozen or so missing ivory fronts (using >> my collection of old ivories) on an old (ca. 1911) Steinway grand in >> otherwise pretty good shape. Don't normally work on old uprights much >> anymore, but I decided to do this partly because I enjoy doing chipped key >> repairs with the acrylic kit. >> >> I discovered when I got the keys home that they don't in fact seem to have >> used ivory wafers, or linen or glue and whiting on these originally. > Instead >> it looks to me like the tops of the keys were scored with small grooves >> front-to-back (very straight and consistent) and some sort of glue must > have >> been used, although I really don't see any remnants of glue. >> >> I've been reading old journal articles trying to learn the right way to > use >> ivory wafers, and have gotten the clear impression that ivory will only > work >> using a linen undersupport. Otherwise, it will crack eventually. Yet these >> keys have survived 90+ years (most of them, anyway) and look great. They >> haven't even curled much. Can anyone tell me how Steinway glued these on? >> Was it just hide glue? >> >> Another thing I don't get about these keys is that there is a wood insert >> about 3/4" wide and 3/16" thick right in the middle of the fronts, on top > of >> the keys - what was that for? Related to making the mortise? >> >> Pardon my ignorance. >> >> Any suggestions will be appreciated. >> >> Allen Wright >> Cincinnati, Ohio >> _______________________________________________ >> pianotech list info: https://www.moypiano.com/resources/#archives > > > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives
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