Posted on August 11, 2021March 5, 2024 by Dale Phillips Jatoba Jatoba by Nicholas Von Robison and Debbie Suran Originally published in American Lutherie #36, 1993 and Big Red Book of American Lutherie Volume Three, 2004 Nick: Deb, you just recently completed your 100th instrument. That’s great! Why did you choose jatoba? Debbie: I wanted to do something special for my 100th instrument. There were times when I was starting out when I thought I’d never live long enough to get into double digits! I decided to build a hammered dulcimer (my 95th) entirely from salvaged woods. I called on friends from CompuServe’s crafts forum’s woodworking section for help, and they sent me maple flooring from an old gym for the pin blocks, birch door casings from a 1913 old-folks’ home for bracing, and the redwood bottom of a wine cask from a 19th-century California monastery for the soundboard. You can still smell the wine on a damp day! Unfortunately, I wasn’t able to find any salvaged wood nice enough for the exterior frame and bridges for the instrument, so I decided instead to use a lesser known species of wood. In 1986 I bought some tropical woods from a couple who had lived in Brazil for several years and who were augmenting the cash income from their homestead by importing Brazilian woods that were being harvested in an ecologically sound manner. They wanted a hammered dulcimer and I wanted some wood, so we swapped. Greg had a number of woods available that I’d never seen or heard of before and was quite insistent that I give these a try. He was persuasive, so I took some Amazon rosewood (Dalbergia spruceana), one piece of macacaúba (Platimiscium ulei), and a piece of jatoba (Hymenea courbaril). Both jatoba and macacaúba qualified as lesser-known species in those days; the jatoba had more character so that made the decision. A rather roundabout way to be introduced to a new wood. How did you first stumble onto jatoba? 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, 2021March 5, 2024 by Dale Phillips Wood Bibliography Wood Bibliography by Nicholas Von Robison Originally published ?, 1994 and Lutherie Woods and Steel String Guitars, 1998 The literature covering trees, wood, and wood technology goes back many years. Unfortunately, much of the information one desires on a certain wood or species is scattered about in the form of articles or abstracts in obscure scientific or trade journals. What follows is an annotated listing of the major works from which gleanings in the notes or bibliographies of these will enable one to delve into the literature more fully. Many, possibly most, of these books may suffice in answering any questions one may initially have. Many are out-of-print (OOP); many are unique and have no current replacement. They may be found in libraries, used book stores, or by having a search done by a specialist bookseller. Prices change frequently so the following categories are used for those books currently in print: inexpensive (up to $10), moderate ($10–$25), expensive ($25–$50), very expensive ($50+). This list is not exhaustive, but I believe it to be fairly comprehensive and it will aid anyone who wants or needs to learn more about woods or the trees they come from. Finding some of these books is very difficult but half the fun of it. Nomenclature Bailey, L. H. and Bailey, Ethel Zoe Hortus Second. New York, NY: Macmillan Co., 17th printing 1972. A concise dictionary of gardening, general horticulture, and cultivated plants in North America. While this 800-or-so page book covers plants other than trees, it’s a useful reference for spelling, checking families, and looking up archaic plant names. Hortus 3rd now out. Very expensive. 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, 2021March 6, 2024 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 August 11, 2021March 6, 2024 by Dale Phillips Acid Rain Acid Rain by Nicholas Von Robison and Perry Thomas Originally published in Guild of American Luthiers Quarterly, Volume 12 #1, 1984 and Lutherie Woods and Steel String Guitars, 1998 See also, “Acid Rain Update” by Nicholas Von Robison “World Forest Outlook” by Nicholas Von Robison and Parry Thomas Introduction Enjoy is the word for this afternoon; a hundred kinds of enjoyment. If a wood sculptor had been along on this hike he or she would be having a field day — gnarled roots and trunks on the forest floor; cracks and twistings of naked stumps deceased and debarked; rolling, convoluted patterns of aging limbs. Perry and I stop and investigate engravings made by beetles on some logs. The wood, now bleached, has been hewed out and channeled in designs so intricate they can hardly be retraced. There is a simple artistry about this free-form flow, and it captures the imagination. The creatures whose paths crossed here were of a system of life completely different from our own, yet linked to it. The higher we ascend toward the Angeles crest, the richer the forest seems to become. Patches of Indian paintbrush and columbine increase in size and density. Berries grow in thickets. Alders enclose the streams. Mosses clothe the rocks. Lichens festoon the branches of trees and occasionally glow with a brilliant chartreuse when touched by a spot of sunlight. And everywhere there are trees. We reach the crest, stop to look around a bit, and give each other congratulatory smiles. Our smiles are touched with a bit of whimsy; neither of us are as young as we used to be, and we know the price in sore muscles we’ll pay for this excursion tomorrow. We continue on, the Los Angeles basin five or six thousand feet below us; we adjust our gait for descent rather than ascent. We come to a stand of lodgepole pines and discover a spring gushing out from an outcrop of granite. We plop down and share sausage, cheese, chocolate, and top it off by draping our snouts in the spring; water so cold it hurts the teeth. 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 23, 2021March 6, 2024 by Dale Phillips Brazilian Tonewoods Brazilian Tonewoods by Roberto Gomes Originally published in American Lutherie #33, 1992 and Big Red Book of American Lutherie, Volume Three, 2004 For a long time I have been wishing to write an article for American Lutherie about some Brazilian tonewoods that have been used here in Brazil for guitar backs and sides. As a maker of Baroque, romantic, and classical guitars, as well as vihuelas, I started to depart a bit from tradition. I began to study more deeply the vast world of Brazilian flora and some other woods that we might substitute for “jacarandá da Bahia,” also known as Brazilian rosewood, Rio rosewood, and Dalbergia nigra. Here in Brazil, the name jacarandá, or sometimes caviúna is used for all rosewoods, that is, all members of the genera Dalbergia and Machaerium. The name jacarandá comes from a word in the native Tupy-Guarany language, yacarãntã, which means hard wood or hard tree, and caviúna comes from kawiuna, meaning dark green bush. 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. Brazilian Tonewoods by Roberto Gomes Originally published in American Lutherie #33, 1992 and Big Red Book of American Lutherie, Volume Three, 2004 For a long time I have been wishing to write an article for American Lutherie about some Brazilian tonewoods that have been used here in Brazil for guitar backs and sides. As a maker of Baroque, romantic, and classical guitars, as well as vihuelas, I started to depart a bit from tradition. I began to study more deeply the vast world of Brazilian flora and some other woods that we might substitute for “jacarandá da Bahia,” also known as Brazilian rosewood, Rio rosewood, and Dalbergia nigra. Here in Brazil, the name jacarandá, or sometimes caviúna is used for all rosewoods, that is, all members of the genera Dalbergia and Machaerium. The name jacarandá comes from a word in the native Tupy-Guarany language, yacarãntã, which means hard wood or hard tree, and caviúna comes from kawiuna, meaning dark green bush. ■ Genus Dalbergia. Apart from the famous Dalbergia nigra, D. violácea, known here in Brazil as “jacarandá do Cerrado,” is the wood that has wrongly been called “Brazilian rosewood hybrid.” It was first introduced by Dr. Eugene Follman of Follman and Sons, a dealer in wood for musical instruments in São Paulo. Follman believed that it was a new kind of rosewood, and I was about to name it D. Follmanense, but further studies led us to conclude that it was a true D. violácea. It is a dark wood, and very much resembles East Indian rosewood (D. latifolia), although it is not as purple, more reddish-brown. Its density is .82G/CM3, lighter than D. nigra’s .87G/CM3, and it is medium sonorous. Unfortunately the trees are small and twisted. D. violácea grows in a type of low-level forest called cerrado where it is very diluted with other plants. “Bulges” of it will be found mixed with other species. In areas where it is well populated it is hard to find mature trees because it has been attacked by people who make vegetal charcoal. It is almost impossible to find quarter-cut sets of this wood. Good-sized trees are only found in the south of the State of Piauí and in the north of the State of Goiás. D. decipularis (ex-Frutences), commonly known as tulipwood, is almost extinct in wide boards, although Follman and Sons still have some sets. This is one of the most sonorous woods I have ever seen. It really sings! It is denser than D. nigra, with a specific gravity of around .96G/CM3. Its reddish stripes on a light yellow background look very attractive, although departing from the dark colors traditionally found on fine classic guitars. But this is a great tonewood. The last of the useful Dalbergias in wide dimensions is D. spruceana, known as “jacarandá do Pará.” As the name implies, it grows mainly in the northern State of Pará. It is the most dense of the three, at around 1.10G/CM3. It is very dark with some greenish-brown color, although there is no striking grain figure. Compared to D. nigra it is medium sonorous, but it is more sonorous than D. violácea. Comparing these Dalbergias to East Indian rosewood (D. latifolia), D. decipularis and D. spruceana are denser, but equal in sonority. This latter claim could be a matter of taste, but what I state is driven by common sense. D. decipularis is lighter in color and D. spruceana is similar in color or darker. D. violacea is equal in color but a little bit less sonorous. A young Dalbergia nigra tree. All photos by Roberto Gomes. Ever wonder what Brazilian rosewood leaves look like? Now you know. ■ Genus Machaerium. The best-known of the Macheriums is M. villosum, known internationally as Santos rosewood. The Brazilian names are “jacarandá Mineiro” (from the State of Minas Gerias) or “jacarandá Paulista” (from the State of São Paulo). It often is a big tree, giving boards that sometimes reach 70CM in width. Like most of the rosewoods it has a sweet smell when cut or sanded. It is a yellowish-green wood, but with oxidation it becomes darker and is almost chocolate brown when old. It is somewhat more sonorous than D. violácea and less dense, with a specific gravity of .78G/CM3. M. scleroxylon is called caviúna here, and known abroad as morado or Bolivian rosewood. It is a beautiful hardwood, with purple, brown, and black streaks. Like M. villosum, it is possible to find large trees. It also has the same density as M. villosum, about .78G/CM3, but the wood is very different. The last of the Macheriums, and the most beautiful, is M. acutifolium, called “bico de pato,” meaning duck’s beak, in Brazil. It looks very much like jacarandá da Bahia, although it is not as black, but rather is dark brown with some yellowish and pink shading. It is a rare wood to find, and is the most dense of the Macheriums at about 1.00G/CM3. Most of the woods listed here are under “forbidden exploitation,” meaning they are listed as endangered species by the IBAMA, or Instituto Brasileiro do Meio Ambiente, which is the Brazilian Institute for Nature and Environment. The list includes all Dalbergia species. Nonetheless, it is possible to find them around. Two views from the coastal road leading to the IBAMA (Brazilian Institute for Nature and Environment) reserve in southern Bahia.This shows the beginning fo the Mata Atlântica (Atlantic rainforest). The ocean is just two miles from the edge of the forest. Devastation. ■ Genus Zollernia. The wood that is often called ocelot ear in the USA is known in Brazil as orelha de onça, meaning jaguar’s ears. It is Zollernia falcata, a dense, close-grained, and beautiful wood sometimes resembling D. nigra with a specific gravity around .95G/CM³. It is resinous, but with some care it glues well. Sérgio Abreu, the famous classical guitarist, is now working successfully as a guitar maker. He has built several guitars with orelha de onça with excellent results. The wood has powerful reflection properties although it is not especially “musical.” It is a good Brazilian-rosewood substitute. Another useful wood is Z. ilicifolia, known as mucitaiba. ■ Genus Platimiscium. There is some excitement going around about the acoustical properties of a wood we call “macacaúba.” The name is from the Amazon-Tupy word macaca’iwa meaning “tree of the monkeys.” The botanical name is Platimiscium ulei and its specific gravity is .80G/CM3. Fransisco Munhoz of São Paulo says that it is a very “musical” tonewood, giving a lot of harmonics and “timbres.” It’s color is like that of a light-colored mahogany. The Institute of Technical Researches of São Paulo claims that the wood’s molecular structure is the closest to that of D. nigra. There are about 20 species of Platimiscium in Central and South America. The common ones in Brazil are P. ulei, P. trinitatis, and P. duckei. A dirt road through luxurious vegetation brought my taxi to a locked gate with signs warning that nobody is allowed onto reserve property without an official escort. There wasn't a soul around, so we jumped the fence. The taxi driver is walking down the road inside the reserve. Notice the height of the trees. The trunk of this twenty-year-old D. nigra tree is about 10" in diameter. The bark is not wrinkled, which means that there is almost no heartwood, only sapwood. The Brazilian government banned the importation of all foreign timber in 1982. In 1983, some Amazonian forestry departments did research on over a hundred species of trees growing in the rainforest, with the main idea of finding substitutes for the banned spruces, red cedar, and ebony. The result of this research was the most complete study done about the potential of an enormous variety of woods in Brazil with good and even excellent properties for tonewoods. The ban on importation was over by 1984, so the results of this study did not have time to mature. Due to circumstances such as the huge geographical distances in Brazil, economic constraints, and the ill will or indifference of government authorities, the research is almost fading away, which is a great pity. One of these studies was the one done by Dr. Harry Van der Slooten. Another, published by the Ministry of Agriculture, looked at 20 promising woods. And British guitar maker Paul Fischer has published the results of his experiments with some Brazilian hardwoods. I hope that in the near future more people will come to help us get deeper into this subject, which is one of the most precious legacies for future generations of luthiers on this planet. American friends have asked if developing uses for lesser-known tropical woods will help to save them, or just destroy the forest. This is a hard question to answer. Is must be hard for Americans to understand what it is to live in a Third World country. Unfortunately, most of the people here don’t care very much about their natural treasures. Starving, uneducated people are not in a situation to think and act in a healthy way. After centuries of exploitation from powerful nations and corrupt governments, they don’t give a damn. So when I am asked how to save the forests and still use tropical woods, the answer is a painful “I don’t know!” ◆
