Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

 Previous item  Up One Level Next item

indigo

A blue vat dyestuff, with the formula (C 16 H 10 N 2 O 2 ), formerly derived by fermentation of the leaves of the herbaceous shrubs Isatis tinctoria, Polygonum tinctoria, etc., but now manufactured from anthranilic acid (C 16 H 10 N 2 O 2 ), and used, along with wood ashes, mainly in northern Nigeria, in the removal of hair from goatskin. In the 19th century the natural product was used, in conjunction with sulfuric acid, to make a blue coloring matter for use in the production of leather cover marbles. (130 )




[Search all CoOL documents]


URL: http://cool.conservation-us.org/don/dt/dt1843.html
Timestamp: Saturday, 19-Nov-2011 13:18:42 PST
Retrieved: Saturday, 18-Nov-2017 14:04:23 GMT