Books › The Repairing & Restoration of Violins, 1903 › scan 31
Scan 31
The Repairing & Restoration of Violins, 1903
6 lines. Read by computer on 3 September 2026. Printed page 17. See the scan on archive.org.
1relieved and the fingerboard free to take its own part. This, although a trifle in itself, requires for its cure proper attention with suitable appliances.
3After the removal of the strings, the first suggestion naturally occurring will be to insert, with the blade of a knife, some glue and leave it to dry. This is more likely than not to make matters worse, as it should always be borne in mind that glued surfaces always require pressing together, however well they may fit. Glue contracts as it dries, and in the process apparently disperses and clings to any other bodies rather than to itself. To put this in another way, if air is allowed to insinuate itself between the two surfaces which it is desirable to bring into closest conjunction, the contraction, particularly if good, while in progress, will cause a separation in the central mass of the glue, while the two surfaces will be left as before, independent of each other, but more clogged. Pressure must therefore be invariably brought to bear behind the opposing parts, so as to drive out the air from between and prevent its re-admission—the necessity of an exact correspondence of the parts will be obvious—at the same time the glue is to some degree forced into the pores of the surfaces, and when the moisture has dispersed among the myriads of cells composing the structural growth of the wood and finally evaporates from the external ones, the glue, having hardened, will hold the parts together with a tenacity that can only be overcome by prolonged application of moisture or actual destruction of the parts.
5There is one very important consideration in connexion with glueing operations that must not at any time be lost sight of—that of atmospheric temperature. Much trouble may be brought about by inattention to this help or obstruction, for it will act both ways according to circumstances. In the glueing of important parts in the construction of pianofortes, the operators are careful to have the temperature of the surrounding atmosphere sufficiently elevated, as well as heating those portions of the structure which are to be accurately and lastingly joined, and particularly where hard woods and smooth
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