Posted on

Rosewood and Ebony Shortage

Rosewood and Ebony Shortage

by Robert O. Larson

Originally published in Guild of American Luthiers Quarterly, Volume 8 ,#1, 1980



Note: Mr. Larson is President of VIKWOOD LTD., a large American Importer of rosewood, ebony, and spruce. He is a member of the Forest Products Research Society and has served as Tropical Woods Committee Chairman and is currently on the Mid-West Board of Directors.

Innumerable articles have been written during the past year concerning the extreme shortage of rosewood and ebony supplies for the luthier trade. Having just returned in November from my second trip to India in 1979, I am happy to report that the situation is not as glum as it appears from the articles in the trade journals. There are adequate supplies of rosewood and ebony logs and a large number of competent log converters who can supply dimensioned items such as backs and sides, fingerboards, and even machined bridges in goodly quantity.

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

Reinventing the Celluloid Tortoise

Reinventing the Celluloid Tortoise

by Henry Stocek

Originally published in American Lutherie #61, 2000 and Big Red Book of American Lutherie Volume Six, 2013



Celluloid is a dinosaur, and making it is a disappearing art. Only musical instruments and ping-pong balls require it anymore. Yet it is the only plastic that can resemble organic materials, have a beautiful depth in its look, and be sliced into thin sheets that remain stable. Acetates and resins still cannot achieve the look and remain stable at the thicknesses required for pickguards.

Its composition is very simple: cellulose soaked in a nitric acid solution and plasticized with camphor. Cellulose is derived from the cell walls of any plant. Cotton used to be the source of the cellulose used to make celluloid, but I think wood is the main source today because it’s the cheapest. In 1846, it was discovered that if cotton was soaked in a nitric acid solution, they got nitrocellulose. With a lot of nitric acid, it becomes an explosive — gun cotton. The Navy shoots big guns with this even today. With a less acidic application, the nitrocellulose is a nonexplosive stuff that can be molded into solid shapes, although it is very brittle. About 1860, John Wesley Hyatt accidentally discovered that by adding camphor, an aromatic paste from an Asian tree (think Vicks and mothballs), the nitrocellulose became a moldable solid that did not get brittle. Hence, celluloid. Today, solvents like acetone and alcohol are used to blend it. It’s cooked under pressure once the color composition has been established. It is an approximate science — more art and intuition than exactness. Hence the difficulty in achieving a tortoise pattern and color that come out right.

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

Router Trimming Attachment

Router Trimming Attachment

by James Gilbert

Originally published as Guild of American Luthiers Data Sheet #135, 1980

 

This attachment plate is used on the Dremel Moto-Tool in place of the regular router base plate. The other end is drilled and slotted to fit the Sears router attachment part #25731. The Sears attachment is used for laminate trimming. It has an adjustable slide and a roller guide to follow contours easily.

The full size drawing below could serve as a rough template for cutting and drilling a piece of 3/16" aluminum.

The only modification that I have made to the manufactured units is to drill an extra hole in the Sears attachment for securing it to the base plate. This way it can still be used on a regular router. ◆

Posted on

Cleaning Shop, Part 1

Cleaning Shop, Part 1

by John Calkin

Published online by Guild of American Luthiers, December 2021

see also,
Cleaning Shop Part 2 by John Calkin

 

Anyone who has entered the field of lutherie in the last 25 years will have a difficult time envisioning the lutherie scene when we Old Farts came up in the 1960s through about 1985. There were very few books available, and useful magazine articles were scarce. Tools and jigs had to be made in the shop. Previously owned instruments were used; there were no vintage instruments until George Gruhn began telling us there were. A few small outfits sold tonewood. There were no mega-suppliers like today.

When I slotted my first fretboards I saved the sawdust in 35MM film canisters to use as wood filler. I saved every scrap of precious hardwood I encountered. My life as a luthier packrat had begun.

I had my own shop from 1980 until 1997. I started with dulcimers and added hammered dulcimers, electric guitars, flattop mandolins, bouzoukis, resonator guitars, bowed psalteries, banjos, ukuleles, and acoustic guitars. Each instrument required separate molds, benders, wood, workboards, jigs, and often tools. I was able to move quite a bit of stuff when I changed states, maintaining my status as a packrat, but my bad habit exploded when I hired on with Huss & Dalton. I worked there for 19 years, and many scraps from the more than 4000 guitars and banjos we made came home with me. As the years went by I spent less and less time in my shop, yet the collection of stuff continued to swell. Seriously, the concrete floor began to fracture.

I knew other packrats well enough to notice the signs of the disease. As their collections increased, the old stuff was buried under the new. Yet in their minds they not only thought they could remember it all but how and when it would all be used. They were pathetic. When I finally realized I was avoiding my shop because of the clutter, I had to face the fact that I was one of "them". I began tossing bits and pieces but the shop looked the same. I backed my truck up to the shop door and threw in all the obvious dross, but the next day I couldn't tell the difference. The second load contained enough rosewood and ebony to tilt my truck slightly sideways, not to mention sections of old-growth redwood 6x6s a friend had given me that I was eventually going to jig up to resaw into quartersawn soprano ukulele tops. Parts of my shop saw daylight for the first time in 20 years. I'm still not done, but I think I've lost my rank as a first-class packrat. I'm down to third-class, maybe.

So what was all that stuff? You'll have to wait for Part 2. ◆

Both photos by John Calkin.

see also,
Cleaning Shop Part 2 by John Calkin

Posted on

Restoring a “Church Bass”

Restoring a “Church Bass”

by Frederick C. Lyman

Originally published in American Lutherie #98, 2009



“Restoration” is not really a good term for what is done by luthiers who work on old bass fiddles. They are trying to create an instrument that has not existed before, using pieces that give it historical continuity and prestige. Connection with the past, recent or distant, is important to musicians. Having an instrument that can be connected to a previous musical era seems to do a lot to build a player’s confidence and help him or her form a conception of music-to-be.

So given an old instrument that needs a lot of work to be playable, the repairman tries to keep in mind the continuing identity of that particular fiddle. It must seem that there is an unbroken link between what was in the mind of the original creator, and the present-day sound. If this is an illusion, that may be better yet, as we are already in a realm of rampant subjectivity.

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.