Materials Engineering of Violin Soundboards by Stradivari and Guarneri

Cheng Kuan Su, Szu Yu Chen, Jen Hsuan Chung, Guo Chian Li, Brigitte Brandmair, Thomas Huthwelker, John L. Fulton, Camelia N. Borca, Shing Jong Huang, Joseph Nagyvary, Hsiao Han Tseng, Chih Hui Chang, Dai Ting Chung, Rafael Vescovi, Yi Shiuan Tsai, Wenjie Cai, Bing Jyun Lu, Jia Wei Xu, Chia Shuo Hsu, Jun Jie WuHao Zhi Li, Yu Kai Jheng, Sheng Fong Lo, Hao Ming Chen, Yi Ting Hsieh, Po Wen Chung, Chien Sheng Chen, Yuh Chang Sun, Jerry Chun Chung Chan, Hwan Ching Tai

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We investigated the material properties of Cremonese soundboards using a wide range of spectroscopic, microscopic, and chemical techniques. We found similar types of spruce in Cremonese soundboards as in modern instruments, but Cremonese spruces exhibit unnatural elemental compositions and oxidation patterns that suggest artificial manipulation. Combining analytical data and historical information, we may deduce the minerals being added and their potential functions—borax and metal sulfates for fungal suppression, table salt for moisture control, alum for molecular crosslinking, and potash or quicklime for alkaline treatment. The overall purpose may have been wood preservation or acoustic tuning. Hemicellulose fragmentation and altered cellulose nanostructures are observed in heavily treated Stradivari specimens, which show diminished second-harmonic generation signals. Guarneri's practice of crosslinking wood fibers via aluminum coordination may also affect mechanical and acoustic properties. Our data suggest that old masters undertook materials engineering experiments to produce soundboards with unique properties.

Original languageEnglish
Pages (from-to)19144-19154
Number of pages11
JournalAngewandte Chemie - International Edition
Volume60
Issue number35
DOIs
StatePublished - 23 Aug 2021

Keywords

  • ICP-MS
  • IR spectroscopy
  • NMR spectroscopy
  • X-ray absorption spectroscopy
  • cultural heritage

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