Framboidal pyrites in antique books

Javier Garcia-Guinea (), Jesus Martinez-Frias, Rafael Gonzalez-Martin and Luis Zamora
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Javier Garcia-Guinea: Museo Nacional de Ciencias Naturales CSIC
Jesus Martinez-Frias: Museo Nacional de Ciencias Naturales CSIC
Rafael Gonzalez-Martin: Museo Nacional de Ciencias Naturales CSIC
Luis Zamora: Archivo Histrico Nacional CSIC

Nature, 1997, vol. 388, issue 6643, 631-631

Abstract: Abstract During the Middle Ages and the Renaissance, ink was commonly manufactured by mixing tannin with iron sulphates. The anoxic environment inside ancient books favours the reduction of the sulphate in the ink and allows spherical aggregates (framboids) of submicrometre-sized pyrite crystals (iron sulphide) to be formed.

Date: 1997
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DOI: 10.1038/41677

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