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Jeffrey Holmes

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Perhaps this is not the right feed, but i also wonder if someone can post photos of different varnish among violins, and how you can tell the age and origin of the violin based on the varnish. 

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This is an internet database I have found today:

The CAMEO - Conservation and Art Materials Encyclopedia Online

Its "Dye analysis" section covers many natural and synthetic dyes.

The "Materials database" contains "chemical, physical, visual, and analytical information on over 10,000 historic and contemporary materials used in the production and conservation of artistic, architectural, archaeological, and anthropological materials".

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An interesting article  from Acoustics Today  - Supplementary Text Violin Acoustics

including simulation on  plate mode , rib coupling, shell modes, f-hole Helmholtz modes, sound post and base bar. See how the mode frequencies evolve with f-hole size, sound post off set....  , and how the modes evolve from nearly zero rib coupling to strong rib coupling.

https://acousticstoday.org/supplementary-text-violinacoustics-colin-e-gough/

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