Better than Ebony
Light and Darkness on a DNA-Strad, London 2026 with SonoWood Black fingerboard
I found a replacement material for ebony! It is densified and coloured beech wood called Sonowood Black.
The quality of the ebony we can buy today is not satisfying when comparing it to the much denser stuff where you hardly see any pores as we find it on some of the fine French instruments and bows from the 19th century. For sound reasons, I left my fingerboards made of the modern ebony very thick, because I found that a violin with a light fingerboard can lack in substance of sound. That works, but then the maple part of the neck becomes quite thin and that is not ideal for the long term health of the violin, since the neck wears down with playing and will need replacement sooner. Also, the grooves of the top nut need cleaning out with a needle file frequently, when the top nut material is not wear-resistant enough. We have a few pieces reclaimed from old fingerboards for that, but they are always in short supply.
Fingerboard and top nut in SonoWood Black
With the new Sonowood Black, I can achieve excellent acoustic results with a fingerboard thickness of 4.8mm on the sides, which leaves the neck with much healthier proportions. With a weight of around 62 grams, it still weighs about 10 grams more than my ebony fingerboards.
In 2010, my former employer Mark Wilhelm started to look for alternatives when he heard a report by a team from the Zürich Zoo who filmed how some of the ebony was looted from the Masoala Nature Reserve in Madagascar. Together with some researchers at ETH Zürich, they began to develop alternatives: Musikinstrumente aus bedrohtem Holz - SRF
In 2018, a first non-tropical material that worked really well was ready: densified spruce. Wilhelm Geigenbau hosted a research conference where we compared all available materials - I reported on here. I really liked the properties of the densified spruce but its light colour did not work with my aesthetics. “Beauty in light and shadow” - I need every bit of darkness I can get to let the wood glow!
One of my violins with a densified spruce fingerboard - Suhr 2018
In the meantime, the ETH team has founded a spin-off and is producing various items out of densified wood ranging from credit cards to satellite components - the material is wood, 100% biodegradable. And, finally, they have also found a way to colour it black enough for my violins. They are still tinkering with different colouration processes, but I had two batches that are looking and working great!
The fingerboards come roughly pre routed. To finish and fit them to the violins, we use the same tools we work ebony with. That said, we do use the latest Veritas PM-V11 blade in our block planes, which handles it much better than softer steels. The playing surface comes routed to a very good profile and only needs sanding - a welcome shortcut. It polishes up like the best ebony ever.
It has the natural look and feel of wood, and lowers the maintenance of fingerboard and top nut a lot. After two batches, I am convinced. This is the material I’ll be using from now on.