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Focus: Basic Soundpost Patch

Posted in Focus on Violin Restoration, Tools and the Trade, tagged , , , , , , , , on February 8, 2015| Leave a Comment »

Soundpost patch? Huh?

Whenever I have to tell a client that their instrument is in need of a soundpost patch, I am prepared to provide an explanation. Usually that means pulling up a portfolio of photos, or even reaching for an actual project undergoing the procedure.

A patch is the correct repair for a crack running through the soundpost area. For the purpose of this essay, I’m referring to a crack in the top of the instrument. Cracks in other areas of the top may be reinforced by the installation of small cleats to the surface of the wood, like this:

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A patch is a more invasive procedure, but the location of a crack in the soundpost area necessitates its implementation. Wood that is compromised by a crack or, as we will see, worm damage, will be vulnerable as it’s subjected to the downward pressure of the bridge, and the upward pressure of a properly fitted soundpost. In addition, the area must be free of protruding cleats so that a soundpost can be installed and its placement adjusted as necessary.

A patch requires removing damaged wood and then inserting healthy wood which is shaped flush to the surrounding area. In the end it looks like this:

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A recent project of mine provided an opportunity to take some illustrative pictures. This violin did not have a crack so much as it had a concentration of worm runs in the soundpost area. Thankfully, this little worm exercised its voracious appetite mostly below the varnished surface, so a patch was the appropriate remedy. As an aside, remediating worm damage is a topic that inevitably provokes animated, or shall I say agitated, discourse among my colleagues, frequently followed by the consumption of copious amounts of alcohol.

Careful planning is the first step in assuring a successful repair (violin restorer Truth #1). I have seen patches fail because they were poorly planned and/or poorly executed. Here’s one that suffered on both accounts:

 

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The forward edge of the patch did not hold, leading to serious sinking in the bridge area.

So back to my current project. Here is how I planned the patch, so that the bridge and post would be situated at the strongest point. Some of the worm runs are visible where they had been filled by a previous repairer.

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With the top of the instrument fully supported by a plaster cast, damaged wood is carefully removed, creating a kind of bathtub shaped concavity. When I’m done, it measures .5mm at it’s thinnest in the center – thin enough to see light radiate through when held in front of a lamp. Photo bomb by the ex-worm that shall not be named.

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New wood is chosen to match the old. The patch wood is oriented so the grain lines up nicely with the original. Rough fitting of the new wood is done with a sharp knife or chisel. A dusting of chalk in the patch bed helps reveal high spots as the patch approaches its final fit. Final fitting is done with a very sharp scraper, eliminating any ridges or high spots left by the knife. Small cleats, temporarily glued to the instrument top ensure that the patch is placed in exactly the same position as it’s being fitted and then, as it’s glued in.

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When the patch is fitting perfectly, the surfaces are brushed free of chalk and it’s glued in with hot hide glue. Later, the cleats will be removed and the new wood will be shaped down to a thickness consistent with the surrounding area. Here’s the finished patch. I’ve added a couple of  cleats at either end where the grain runs out, for extra reinforcement.

 

 

 

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This is a very straightforward sound post patch. Since the damage did not migrate through to the varnish side, there was only a small bit of filling and retouch to achieve an excellent result.

Just a few last words about soundpost patches in violins. An instrument with a well-executed patch in the top can be a very healthy instrument indeed. (Please note – a patch in the back may warrant a different kind of consideration, but that’s another topic). An instrument with a soundpost patch in the top is not going to suffer tonally. If anything, healthy wood where there was once deterioration and/or damage is more likely to restore the integrity of the structure, and hence, facilitate a favorable tone production.

 

 

 

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16 Ways to Practice Being Quiet

Posted in Tools and the Trade, tagged , , , , , , , on June 17, 2013| 2 Comments »

Hah! Discovered this little collection of violin, viola and cello mutes while I was cleaning out some drawers:

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Rosewood, boxwood, ebony, metal, plastic. Waverly, Ton-Wolf, Geschützt, Made in Germany. Some are weighted. One has an A pitch pipe. Arranged on a nice piece of Bosnian maple, hand carried from Ciresa, in the Dolomites. Maybe I’ll make a fiddle out of it someday.

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A Little “Bit” Goes a Long Way

Posted in Focus on Violin Restoration, Tools and the Trade, tagged , , , , , , , , , on April 30, 2013| 2 Comments »

This post could easily be a sidebar to two previous posts. It describes a variation on a button doubling, in this case including an ebony crown and a tricky bit of edge replacement. More importantly, in my mind, as another example of a Disappearing Act, it expresses again the “Restorer’s Mind”.

This fiddle came into my shop after a memorable night of live bluegrass, performed on the stage that apparently ate that little piece of maple, which, in its absence, has inspired this post. “Is it possible that it’s in the case?” I asked my client. Sometimes I get lucky, but not this time. Maybe it was inadvertently kicked off the stage and since swept up by the janitor. Perhaps it landed in the dust accumulating in the open back of the bassist’s amp. Maybe it secreted itself in the upturned cuff of the bassist’s jeans (always blame the bassist if you can, if there is no horn section). In the slim chance that there is a baritone sax around, the likelihood is that the missing piece will end up in the bell. Not likely in a bluegrass set. In any case our little bit was gone, gone, gone.

Being a restorer, I am always thinking about what I might otherwise be throwing away, and if there is any chance it might be useful. Rather than searching through my stores of repair wood, I found the perfect match right under my nose. There is a certain amount of wood that has to be taken away in the course of repairing the back button. With some careful planning and a fine toothed saw, I was able to “harvest” a chip that could be reoriented and fit to fill the gap left by the wayward chip now seeking its fortune in Nashville. Here is a series of thumbnails, any of which can be enlarged. Hopefully, you will get the sense of the procedure.DSCN0311DSCN0320DSCN0324

 

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In my shop, this is a typical approach to assuring a match when some bit of original material is missing. The first thing I think about is what is about to land on the floor. There’s likely to be some good stuff there.

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Kilroy Was Here Again, and Again

Posted in Focus on Violin Restoration, Tools and the Trade, tagged , , , , , , , , , on March 1, 2013| 1 Comment »

Years ago, I opened an instrument for repair. I was not the first to do so. I was not even the second. My most recent predecessor had not only signed his name, but also left a numbered legend with corresponding arrows clearly identifying his contribution amongst the multiple repairs in the old fiddle. To seal the deal, he used a blue ball point pen, further distinguishing himself from the mere mortals who had signed previously with a lowly pencil. I’m sorry this was before my obsessive picture taking days.

Sometimes, when I open an instrument and see a repairer’s signature/label, I hear myself thinking: Ah, Kilroy was here. Kilroy? Who the heck is Kilroy?  This was an amusing lunchtime digression. Here is a little bit of Americana from urbandictionary.com:

 
In December 1946 the New York Times credited James J. Kilroy, a welding inspector at the Bethlehem Steel shipyard in Quincy, Massachusetts, with starting the craze. Usually, inspectors used a small chalk mark, but welders were erasing those to get double-paid for their work. To prevent this, Mr Kilroy marked his welding work with the long crayoned phrase (“Kilroy was here”) on the items he inspected. The graffito became a common sight around the shipyard and was imitated by workers when they were drafted and sent around the world. As the war progressed, people began opening void spaces on ships for repair, and the mysterious Mr Kilroy’s name would be found there, in sealed compartments “where no one had been before.”
“Kilroy was here…”

So today I decided to put the infamous “Heap of Cello Bits”, which I own, back in the drawer, since I just had another substantial cello job come in that I will actually get paid to do. Instead, I decided to pull out a violin of mine, 19th century French something or other, which I think may be a good candidate for a restoration workshop I may attend this summer. My thinking is that if I can get the cracks repaired ahead of time, I can spend my week away grafting the neck and doing some retouch. I find both of these activities good “travel tasks” because they require a relatively finite set of tools and materials. Retouch is a never ending area of exploration and will always inspire good exchanges with colleagues. And if I can get a graft done too, then I return home with a project solidly moved along.

It’s always a minor thrill to open an instrument. Tonight it was the French fiddle and while there were no serious surprises, good or bad, it was definitely one of those “Kilroy” moments. Kilroy, Kilroy, and Kilroy.DSCN0352DSCN0349

What’s with all the labels? I thought, and then realized that they were all identical except that the handwritten dates spanned 30 years. Our Kilroy in this case is Milton O. Wickes, in case that’s not clear yet.

Currently, the accepted practice among professional restorers is to do the work that needs to be done, be as subtle and/or as eloquent as one can, and leave as little extraneous evidence as possible. My own practice adheres to this principle. Because, in another lifetime I may have been a fantastic spelunker, I conjure images of a pristine, never been explored cavern. Go in, have fun, and pack your crap out.

Still, when I encounter these “indiscretions” in the form of signatures, labels, narratives and veritable road maps, perpetrated by someone other than the original maker, I admit to feeling a little guilty pleasure. Can I puzzle out the whys and wherefores of Mr. Wickes’ three major encounters with this violin? What about that fiddle I had years ago with the simple inscription “do not scrape?” That was a puzzler. Or the Simoutre family history inscribed in a fiddle. Or my favorite, the handwritten apology from a noted Italian maker, for his sloppy repair work: “Repairs according to the price paid.”

Like so many things, I guess it’s a matter of degrees and context. I’m glad Mr. Wickes didn’t plaster his labels all over the inside of a real Joseph Guarnerius, although that would have been the least of it. Labels are removable. Pencil lead is easily washed off. Ballpoint pen, not so much.DSCN0359

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Two Steps Forward and One Backward?

Posted in Focus on Violin Restoration, Tools and the Trade, tagged , , , , , , , , , , on December 3, 2012| 1 Comment »

… or How I “Baroqued” a  Violin That Had Been Previously “Un-Baroqued”.

Try as I might, I could not come up with a catchy phrase that would indicate the opposite of “back to the future”. I love my profession for its fastidious regard for the past, its devotion to the present and its dogged assumption of a future. Because I work with things that are sometimes older than two, three, even four human life spans, I am frequently reminded that the path from here to there is rarely a straight line. In contrast, I think of my beloved Honda Civic which, with 110k miles, is surely headed for the trash heap – a short life lived on a simple trajectory.IMG_0476_3

The inspiration for this post is a violin made by an unidentified member of the  Amati family in Cremona, Italy. That would place its construction probably in the late 1600’s. Perhaps this violin was growing and maturing as Antonio Vivaldi assumed his post at the Ospedale Della Pietà in Venice. Certainly by the time J.S.Bach composed the Brandenburg Concertos, it had found its voice. How it ultimately found its way into 21st century America may never be known, but clearly it would have stories to tell.

My mission was to undo some of what had been done along the way. In the 1800’s many old instruments were retrofitted with a neck in the modern style. The earlier “baroque” style neck, was shorter, shaped differently, and had a ramped fingerboard. At some point, this Amati family violin had been “modernized”. The neck and fingerboard had been replaced with the modern version that we are most familiar with today.

Since my client was a teacher and performer of Baroque music, she wished to have her instrument returned to something approximating its original configuration. A note about early violin construction: originally, the neck of an instrument was secured with a nail driven from the inside of the body through the upper block. The top was glued on last. Here is an example, in this case, an ancient violin from Mittenwald, Germany. IMG_4965

In converting an instrument to baroque, one must decide how far to go. In my client’s case, we wished to change the neck without opening the body. Perhaps in the future, if the instrument needs to be opened for additional reasons, we might discuss changing the bass bar too.

Essentially this job required grafting another new neck. But in this case, a standard modern dovetail joint was modified to achieve the look and feel of a nailed baroque style neck. This is the instrument as it came to me, with the standard contemporary configuration of neck and fingerboard:

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The first few cuts are always made with the door locked and the phone turned off! The neck is removed from the body, and then the scroll is carefully cut away creating a tapered mortise, to which new neck wood will be fitted.

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Here the scroll is ready to receive the new neck wood.

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The joint fits perfectly and can be glued. Later, the peg box will be carved out and the neck shaped in preparation for setting into the body.

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 With the fingerboard temporarily glued on, the neck is set into the body in the usual manner.

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Before gluing, modifications will be made. A cutaway is planned to create a step at exactly the rib height. This will replicate the look and feel of the nailed neck. Also, the underside of the fingerboard will be reshaped in the baroque style.IMG_0555

This is how it looks with the fingerboard removed and the neck pushed back into the dovetail mortise. The top of the violin was cut through to accept the first modern neck. We now have a gap that will be filled with matching spruce, to restore the unbroken perimeter of the upper bouts.

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Fitting this piece of spruce happens before the neck is glued. It will be glued in, shaped, and varnished to match after the neck is installed.

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I use a baroque fingerboard made by Helmut Pöser in Germany. The core is spruce while the playing surface and sides are ebony. The fingerboard comes to me oversized so that it can be shaped and fitted appropriately.

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The underside of the board is precisely ramped to create the correct pitch over the body of the instrument. The length that is suspended is shaped in an aesthetic manner, although in the ancient method of construction, this shape had a practical purpose as well. The bump near the base of the neck provided a positive point to insert a wedge which would exert downward pressure as the top was being glued onto the body.

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The final neck shaping is done with the fingerboard permanently glued on. All new wood has been varnished to match the original.

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The graft blends well into the old scroll.

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The shape of the neck replicates the dimensions of an original Jacob Stainer violin neck c. 1620.

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The new neck is finished! The violin is set up with new baroque tailpiece, bridge and gut strings.

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Now, back to the future? Or would that be forward into the past?

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Stranger Things Have Delighted Me

Posted in Diversions and Transgressions, Focus on Violin Restoration, Tools and the Trade, tagged , , , , , , , , on October 10, 2012| Leave a Comment »

My life improved dramatically the day Mr. G moved in.

If you are a violin restorer, you probably have all the clamps required to make a violin, plus a plethora of other specialty gadgets for holding and clamping every finished part of an entirely curvaceous instrument. Multiply this by x if you work on cellos, too. If you work on viols, you are probably smart to specialize and outfit accordingly. If you work on basses, there is no hope. Usually the violin clamps work for violas, but the cello clamps are, of course, a lot bigger, generally used less frequently, and that much more of a pain to store.

One truism of violin making/restoring seems to be that there are never enough clamps. At least that’s the way it always feels. My answer to this mental state (besides buying more clamps) is to make sure that the ones I have are accessible. Even that thing that I use maybe once every three years. Even that thing I bought because it looked like a good idea at the time, but I still haven’t used it. If I were to put it REALLY away, I would forget that I have it, and then I would need it. And, having forgotten all about it, I would have to suffer hearing myself whine, yet again, about not having enough clamps.

So when I saw Mr. G in a fancy woodworker’s catalog, I thought: “He ain’t cheap, but he might be worth it”! The big question was: “Are we truly a good fit”? Well, Mr. G has exceeded my expectations, so I think I’ll keep him.

I know it would be hard for the general public to understand what’s at issue here. So here is a sampling of some of the clamps I use  on a regular basis:

Now imagine a pile of these oddly shaped objects jamming up your drawers:

I like neat. And I like being able to pick up one clamp up at a time, without a snaggly bunch of hangers-on coming along for the ride. And that’s why Mr G and I get along so well. Look at this:


And this:

And this:

Wait, I’m not done…this:

And finally, this:

Yeehaaw! That just about takes care of everything. ‘Til death do us part!

Did I mention he comes with wheels and is great at holding a glue pot?

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Mediate, Mediate, Mediate

Posted in Focus on Violin Restoration, Tools and the Trade, tagged , , , , , on October 5, 2012| 4 Comments »

This is a follow up to my last post, Not Just Any Open Seam.

Helen commented: “In Australia, we experience very hot summers. Is it more likely for my violin to experience seam bursts”?

Hmm… I live at 42˚N. Helen, if I were to take a random guess, might live at 27˚S, which would place her in or near Brisbane. Please forgive me , Helen, if I’ve got it all wrong! In any case, I think we can explore this topic by making some generalizations, even if she is heading into a prodigal summer while I am inevitably crashing into a long desolate, lonely, cold and miserable winter. No hard feelings.

My initial response to Helen’s query is, “not necessarily.” A basic overview can be helpful in establishing a maintenance plan that may help in troubleshooting some of these seasonal headaches.

My first piece of advice is to find, if possible, a local (to you) violin restorer/maker with a good reputation and establish a rapport. It’s like finding a good doctor or car mechanic – you hope you never really need them, but if or when you do, it’s nice to have a relationship already established. By the same token, it may be smart to schedule a yearly check-up even if you don’t notice that anything is wrong. Your local luthier will have an opportunity to establish a “baseline” for your particular instrument. She or he  will also have insights into local climate-related issues and possibly a sense of what other string players in your area experience as a result.

Beyond that, it’s good to be educated! Here in New England, USA, we have hot humid summers and cold dry winters. Rapid changes in climate conditions, especially humidity, can be stressful for wooden instruments. Your instrument will be happiest if you can protect it from sudden and extreme changes in temperature and humidity. Frequently, I tell my clients “if you are comfortable, your instrument is probably comfortable.” The thing to remember is that humans adjust more quickly to environmental changes. Your instrument may need a little more time and coddling than you are likely to allow yourself.

Your instrument case is a micro-environment. Take advantage of it! Arrive at your destination 15 minutes early and allow your instrument to warm up or cool down in its case before you introduce it to a radically different environment. If you are experiencing dry weather, or if you are moving into a dry environment, add a case humidifier.

The interior of an aircraft, for instance, is notoriously dry. Use a case humidifier! If you are getting onto a plane in Brisbane, in January and landing 24 hours later in Boston, be sure to have a humidifier in your case to help mediate the transition. And keep that humidifier moist. Boston is cold and dry in January! So, a case humidifier can be a very useful tool for mediating cold and/or dry conditions. By the way, anyone who knows me, knows I am not crazy about the kind of humidifier that is inserted into the f hole of an instrument. I see too much interior water damage in instruments.

The trip from Boston to Brisbane in January might be a little safer. Generally, moving from a dry environment to a humid environment is less traumatic in terms of structure, although there can be tonal ramifications. Generally speaking, if I am executing an important gluing operation, eg assembling the top of an instrument, I will want to do it in a dry environment. When humidity is introduced, I may be in for an adjustment, but I will have most likely avoided the possibility of wood cracking.

So what about in the summer? Instruments seams are more likely to open up when the wood dries out in the winter. However, wood moves both ways. I’ve seen seams open up in the summer, too. Also, hide glue can soften in the heat. Consider where you store your instrument – hopefully away from a heat source and out of direct sunlight. An instrument should NEVER be left in a hot car in the summer. If it has to be in the car for a while in moderate but sunny weather, throw a white sheet over it. There is sense in keeping your instrument in a white case.

In the summer, I advise my clients to air condition the room in which their instruments live most the time, if possible. Similarly, in the winter, humidify. Don’t go crazy! Most of us move in and out of different environments and the idea is to MEDIATE, not control everything. Which is impossible anyway.
Mediate, mediate, mediate!

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Not Just Any Open Seam

Posted in Focus on Violin Restoration, Tools and the Trade, tagged , , , , , , , , on October 2, 2012| 4 Comments »

Today I had a client in with a violin in need of gluing. While that in itself is nothing notable, there is an aspect of this encounter that may qualify as a teaching moment, especially apropos to those of us in the Northern Hemisphere who are heading into the heating season.

Violin family instruments are put together with hot hide glue, which has unique properties that are particularly advantageous in some circumstances. I’m not a “science guy” so I can’t answer questions about crystalline structure or tensile strength as opposed to other kinds of strength. I do know, for instance, that drywall screws have incredible holding power unless you whack’em sideways with a hammer, and for some reason, I am reminded of this when I think about violins and hide glue.

Hide glue, made from animal byproducts, is essentially the same stuff that’s been used for hundreds of years in the assembly and repair of violin family instruments. The remarkable characteristics of this adhesive include its strength and its weakness. We have a wealth of instruments with top and back center joints that have retained their integrity for hundreds of years. Be thankful. Then we have the treble side upper bout and the lower bass side seams that, on so many instruments seem to open up on a regular basis. Again, be thankful.

Wood moves seasonally, especially here in New England. In moist weather, it swells. In dry weather it shrinks. Plain and simple. In my house here in Holyoke, the oak floors creak in the winter and in the summer, I can’t close the doors on the antique cherry corner cupboard without risking not being able to open them again until October. In my last house, the oak floors in my living room developed summer speed bumps that would have been the envy of any gated community.

An instrument seam glued with hide glue will break apart when stressed. This is a good thing in mid-winter when the heat’s been on and the wood shrinks. It’s preferable to having the wood itself crack. Having open seams glued is a normal part of violin/viola/cello maintenance. This characteristic of hide glue is also the reason that it is even possible to disassemble an instrument to do interior repairs. So we’re thankful, right?

That said, if a violin maker/restorer is smart, and skillful, he or she will take advantage of the properties of the materials at hand, in this case I’m considering the glue. Hot hide glue can be mixed in ways that varies its strength. A fresh pot of glue will be strongest. With repeated heatings, its strength diminishes. The strength can also be altered depending on the proportion of  water used in the batch. Theoretically, one would be very smart to use the strongest glue, say, for the center joints in the top and back, for setting the neck joint, and for joining fresh cracks. It may be smart to use a weaker glue mix for securing the fingerboard, and assembling the top, which could be subject to seasonal stresses. Remember, an open seam is preferable to a crack.

Speaking as a restorer, we like the fact that hide glue is reversible. It may seem counter intuitive, but the reversibility of hide glue actually increases the chance that an instrument will live a very long life.

Back to my client, who was smart to call in an emergency. She was concerned with the lower block area of her violin, which looked like this (violin is viewed with the back up, so we can see the area where the tailpiece is anchored by the end button):

Indeed, the glued seam had released, but in this case, the loose seam extended over the lower block, leaving the body of the instrument vulnerable to the longitudinal string tension. I suspect that the end grain of the lower block was improperly sized on this relatively “new” instrument, before the top was glued on, causing the area to separate.

One can see from the photo how the string tension has compressed the body from end to end, and the button/rib assembly has abandoned the original glue line. The lower block is no longer secured to the top, and the spruce top is now bearing more than its share of structural tension. Not a good scenario, structurally speaking, BUT one that is easily remedied at this stage. When I loosened the string tension, my client and I both heard the lower rib/block area pop back into place.

This story ends with a simple gluing and a happy violinist! The moral of the story is that all open seams are not created equal. This particular seam opening demanded immediate attention due to the structural issues it presented.

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Focus: Varnish Restoration

Posted in Focus on Violin Restoration, Tools and the Trade, tagged , , , , , , , on September 18, 2012| Leave a Comment »

By the time a restoration project is complete, it’s sometimes hard to remember what it looked like to begin with. I try to take lots of pictures, especially when I expect the transformation to be dramatic. Working with a camera and lighting is an ongoing adventure for me and my success rate is not as consistent as I would like it to be. I do not manipulate my photos with the exception of occasionally adjusting the tint or color saturation so as to come closer to the original.

Violins come in a million subtle shades of…well, brown. Red brown, black brown, yellow brown, orange brown and green brown. That almost covers the spectrum. Blue is probably the least used color in my retouch palette, although it’s occasionally useful to push a reddish brown toward a deeper purpler red brown. I have a 19th century Parisian instrument that may go in that direction.

Here are some sets of sequential photos that show a recent project undergoing extensive retouching of the varnish. If the color of the instrument  seems inconsistent from photo to photo, it’s because the photographer is inconsistent! If there happens to be a digital photographer out there with a busted fiddle, I’d consider trading for some lessons!

I repaired a bad break near the left f hole. The lower right corner has been rebuilt and there was extensive wear and tear to consider. Click on the thumbnails to enlarge.

Here is the finished front:

Here’s a close-up of that f hole break before, during, and after:

Here’s an area of the back:

Finished, the back looks like this:

This is a rather dramatic example of varnish retouching as part of a larger restoration project. Retouching on a small scale is also part of a regular maintenance plan. We use our instruments, and as a result, they suffer some wear, and the occasional hit. Retouching is a way to assure that they age gracefully!

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The Woodworm at My Door

Posted in Focus on Violin Restoration, Tools and the Trade, tagged , , , , , , , , on July 12, 2012| 5 Comments »

Here is a story that no violin restorer in their right mind would share with the public. It may have actually happened to a younger me, or it may have happened to someone else. In either case, the experience was horrifying, but the outcome was actually fortuitous, and certainly edifying. Unfortunately, I have no photos of the actual event, since I may not have been there, but if it seems particularly useful, I will throw in some sketches. Thank you Smith College for the degree in Art.

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Some background: woodworms are little bugs; worms, ie before they become grownup bugs, which I think are moths around the time they start thinking of having little bugs of their own (Elizabeth, my friend the biologist, where are you?). Anyway, they are greedy little freeloaders at best. Their favorite meal consists of protein, protein, protein. They will pick all the sausage out of the Jambalaya, so do not invite them over for dinner. Even though they are called WOODworms, they will always eat the horsehair on your bow first. Then, their next favorite thing in your violin case is glue (hide glue, that is) if they can get at it. They’ll eat your violin when they are done with dessert. They can do some serious damage. Take a look at this:

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When they get around to eating the wood, they will prefer the tenderest cuts. They will eat their way along the fast lane (soft summer grain) and only make the arduous exit across the hard winter grain to re-enter on the southbound lane if the gastronomical landscape is worth a second visit. Pay dirt is having dessert with dinner, such as when a poorly fitted lining holds a pocket of old glue. Then the whole family comes out. Woodworm heaven: would you like maple or spruce with your ice cream tonight?

The other thing you need to know about is that we violin restorers frequently employ the use of plaster casts to support an instrument top while it’s being worked on. The plaster is poured directly on the instrument with a barrier between, usually a thin layer of latex. There are varying methods for drawing the latex down onto the instrument top, before the plaster is actually poured. These days, thanks to my experience in England with master restorer Jean-Jacques Fasnacht, I use a film of latex thinner than what is commercially available. It is so thin that the weight of the plaster as it’s poured is enough to gently force the latex down, assuring a very detailed cast, indeed.

This is actually a cello top prepared for casting, since I may not have been there for the viola in question (we’re getting to that).

Alternately, one can use some kind of vacuum system. I experimented a lot with this a while back, before I studied in England – some kind of box, a small vacuum of some sort, and holes in the box so you can regulate the suction.

Now back to my story. There was a very old viola having quite a bit of work done –  lots of cracks, including a soundpost crack on the top.  Maybe a little arching correction, possibly some edge doublings. The bass bar, while not perfect, looked adequate, so it was left in place. It made sense to make a cast. So the young, unsuspecting violin restorer made the proper preparations: mixed the plaster, engaged the tried and true vacuum system….and watched horrified as the instrument top collapsed, in a split second, with a crack at the bass bar that ran nearly the entire length of the top! After administering appropriate emergency procedures (fresh air and possibly, a gin and tonic), it became evident that this disaster had been waiting to happen. One might even go so far as to say it was very lucky that it happened under these circumstances, and not, say, while performing the Brahms Sonata No.1 in f minor. Very unromantic.

Once upon a time, some lucky bug found the glue joint between the less-than-perfectly fitting bass bar and the viola top and proceeded to act like it was on the payroll for Boston’s Big Dig. Here is my (extrapolated, of course) rendition:

There was little more than air and sawdust underneath the bass bar. The worm’s front door, and presumably some back door, had been overlooked. In the end, the fatal flaw was revealed and the appropriate repairs were made: a long “finger patch” was fitted, replacing the worm runs with healthy wood, and a new, properly fitting  bass bar installed (no glue-filled gaps). Everyone was happy, including the woodworm who had exited years before, oblivious to the havoc wreaked in its wake.

So what can YOU do to avoid having an inadvertent role in a pathetic story like this? PLAY YOUR INSTRUMENT!!! Or at least look it over regularly. Woodworms, ie the adult moths, are most likely to find their way in to instrument cases that are sitting around neglected for long periods of time. If you see multiple hairs on your bow broken at the same place, check your case for signs of uninvited activity. If you’re still suspicious, vacuum it out, and call the doctor!

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