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Chemical characterization and origin of dyes used in the manufacture of Beninese cultural heritage objects
Author(s) -
Fagbohoun Louis,
Mathe Carole,
Gbaguidi Fernand A.,
Ayedoun Marc A.,
Moudachirou Mansourou,
Vieillescazes Cathy
Publication year - 2019
Publication title -
color research and application
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.393
H-Index - 62
eISSN - 1520-6378
pISSN - 0361-2317
DOI - 10.1002/col.22325
Subject(s) - prussian blue , fourier transform infrared spectroscopy , characterization (materials science) , chemistry , conservation , laundry , cultural heritage , environmental chemistry , nuclear chemistry , materials science , environmental science , nanotechnology , chemical engineering , archaeology , geography , engineering , electrode , environmental planning , electrochemistry
Abstract Six objects of Beninese cultural heritage provided by African and Confluences museums of Lyon (France) were the focus of this study. The characterization of colored compounds was achieved using: microchemical tests, Fourier transform infrared spectroscopy and liquid chromatography coupled to a photodiode array detector. The main results reflect the presence of organic compounds like indigotin, 2‐hydroxynaphthoquinone, and mineral ions such as Al 3+ , S 2− , Na + , and Fe 3+ . Dyes were identified from Philenoptera cyanescens (Yoruba indigo) and Lawsonia inermis L. (henna); pigments were identified as laundry blue, Prussian blue, and iron oxides. All of these data therefore make possible the conservation and the restoration of these objects while maintaining their visual and functional integrity.