Posted on August 11, 2021May 21, 2025 by Dale Phillips Violin Varnish and Sealers Violin Varnish and Sealers by Graham Caldersmith Originally published as Guild of American Luthiers Data Sheet #276, 1984, and Big Red Book of American Luthierie Volume One, 2000 Probably more unsubstantiated speculation has been written about violin varnish, its effects on the instrument, and the quest for the “lost” Cremonese recipe than about any other of the subtleties of the violin and its behavior. It is true that those who have examined enough violins to appreciate the variety of varnishing systems employed by different makers in different ages cannot but admire the clear golden-brown varnish sometimes grading to a deep red that characterizes 17th–18th century Cremonese instruments. It is also true that varnish preparation and application techniques changed to more durable and convenient ones towards the end of the 18th century when faster drying oil and spirit varnishes were developed to meet the needs of the growing furniture trade, arguably at the expense of transparency and lucidity. So while bearing in mind that the early Cremonese varnishes were not unique to the violin trade, since they appear on fine furniture and wooden ornaments of the same period, we may reasonably inquire as to how important the varnishing techniques used by the Cremonese Masters were to the excellence of the violins they produced. Were the advantages of Cremonese varnishing merely passive, in that they preserved good violins into sublime maturity, or were they also active, conditioning the wood for optimal acoustical behavior? Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account.
Posted on August 11, 2021May 21, 2025 by Dale Phillips Sealing Wood with Glair Sealing Wood with Glair by Dick Cartwright Originally published in Guild of American Luthiers Data Sheet #154, 1980 and Big Red Book of American Lutherie Volume One, 2000 Procedure: ▶ Beat an egg white stiff and let it stand for a few hours. The clear liquid that settles out is called glair. ▶ Put 5G gum arabic (cheap from any art store) into 20CC water and let stand for a few hours, shaking occasionally. ▶ Add 10CC glair and 1/2G honey to the gum arabic. This solution paints on easily, dries quickly, and is an effective sealer. I suggest two coats. It’s also used by some as a sealer/isolation layer on the outside wood between stain and varnish. Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account.
Posted on June 1, 2021May 21, 2025 by Dale Phillips Twenty Ancient Dyestuffs and Eleven Mordants Twenty Ancient Dyestuffs and Eleven Mordants by Nicholas Von Robison Originally published in Guild of American Luthiers Data Sheet #236, 1983 and Big Red Book of American Lutherie Volume One, 2000 Dyestuffs 1) Madder (Rubia tinctorum) is one of the most ancient dyes, and its color fastness ranks among the best. It is such an excellent source of red that its name (rubia) means red in several languages. In Holland during the 15th, 16th, and 17th centuries, it was the principal source of wealth. By 1792, encouraged by Charlemagne, France was the top grower. We are told that the French Revolution ruined the farmers. They were later revived by a decree of Louis Philippe, who made red caps and trousers mandatory for his army. In England imported madder was also used for army uniforms (redcoats). Before the “Madder Disaster,” England’s total imports came to one million pounds sterling. When alizarin, synthetic madder, was synthesized in 1869, a yearly world madder production of 70,000 tons declined to nothing. Historians speak of untilled and abandoned madder fields and of thousands of starving farmers (Schaefer, The Cultivation of Madder). Today madder can be hard to find; and sweet woodruff, one of the madder family that produces a less potent red dye, may be substituted. If you prepare the dye from roots, be sure not to use too much heat or boil it too long as the color may shift to a muddy brown. 2) Hemlock (Tsuga canadensis), also called eastern hemlock or spruce pine, is an important tannin dye. The bark, either fresh or dried, produces a wide range of colors from rose to slate gray. The nice thing about this plant is that it grows over a wide area of North America so it is easily procured with very little expense. I get mine from a landscape gardener who always saves me a bag of trimmings from one of his pruning jobs. A sharp knife will easily strip away the dark outer bark to reveal the red-purple streaks inside. It is not entirely colorfast. Become A Member to Continue Reading This Article This article is part of our premium web content offered to Guild members. To view this and other web articles, join the Guild of American Luthiers. Members also receive 4 annual issues of American Lutherie and get discounts on products. For details, visit the membership page. If you are already a member, login for access or contact us to setup your account.
