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STRADIVERNIS: study of an organic source varnish based on colophane of maritime pine and linen oil

Submitted by Gabriel Ducos on 24 April 2020
Violin, in reference to the famous violin maker Antonio Stradivario

The aim of the project is to develop an industrially producible bio-sourced varnish based on gum rosin and linseed oil, inspired by the ancient know-how of the violin maker Antonio Stradivari (1644-1737). The difficulty is to meet the specifications of an industrial manufacture while achieving high performance of the varnish.

Supercritical CO2 extraction technique

Submitted by Gabriel Ducos on 18 December 2019
Left: resin; center: rosin; right: turpentine oil

After harvesting, the resin takes the form of a homogeneous mixture. Its distillation makes it possible to obtain two products: rosin and turpentine oil. The objective of extraction is to isolate and sample these compounds accurately. In other words, it is a question of having the finest possible selectivity. The second objective is not to alter the molecules and thus take full advantage of its qualities.