Bow & Bridge Violin and bow makers, as the old books printed them

Books › The varnishes of the Italian violin-makers of the sixteenth, seventeenth and eighteenth centuries, and their influence on tone;, 1904 › scan 14

Scan 14

The varnishes of the Italian violin-makers of the sixteenth, seventeenth and eighteenth centuries, and their influence on tone;, 1904

5 lines. Read by computer on 3 September 2026. No printed page number was found. See the scan on archive.org.

1CHAPTER V.
2OIL-VARNISH FROM TURPENTINE DERIVATIVES AND ITS APPLICATION.
4Observation of dichroïsm in an old varnish—Similar dichroïsm observed in a panel of pitch-pine—Oxidized pitch-pine exhibits the various colours of the old varnishes—When oxidized alone this wood resembles in colour the varnishes of Cremona and Venice; treated with linseed-oil previous to oxidation the resemblance is to those of Naples—These effects discerned to be due to oxides of turpentine and their derivatives—Resin contemporary with the violin—Geographical considerations allot pine products to Brescia, larch products to Venice—Varnish from pine products called Cremonese, from larch Venetian—Linseed-oil selected as the drying oil—Choice of an oxidant—Reason for the selection of nitric acid—Preparation of turpentine varnish—Deductions from results—Its want of cohesion—Reasons for introduction of linseed-oil—Preparation of oil-varnish from colophony oxidized (dry way)—Fusing point of colophony—Oil varnish from colophony (wet way), Venice turpentine and oil of turpentine—Nitrification of the latter described—Preparation of Neapolitan varnish—Preparation of deep-coloured varnishes by dehydration—Difficulties attending the use of the sand-bath; introduction of the water-bath and water-oven—Variety caused by variation of the different factors concerned in the manufacture of varnish—The proportion of boiled oil and its quality—Disadvantages of the Neapolitan process—Relative proportion of resin derived from colophony, Venice turpentine and oil of turpentine—Appreciable difference in products from these three substances—Pale varnishes easy of application, dark ones difficult; significance of resemblance in this respect of old and

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