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Definition of Colcothar
1. n. Polishing rouge; a reddish brown oxide of iron, used in polishing glass, and also as a pigment; -- called also crocus Martis.
Definition of Colcothar
1. Noun. (organic compound obsolete) Polishing rouge; a reddish-brown oxide of iron, used in polishing glass, and also as a pigment; crocus Martis. ¹
¹ Source: wiktionary.com
Definition of Colcothar
1. [n -S]
Lexicographical Neighbors of Colcothar
Literary usage of Colcothar
Below you will find example usage of this term as found in modern and/or classical literature:
1. Chemical Technology: Or, Chemistry, Applied to the Arts and to Manufactures by Walter Rogers Johnson, Friedrich Ludwig Knapp (1849)
"Oxide of iron or crocus, also called colcothar (prepared by roasting green vitriol
and washing), is employed for polishing plate-glass. Fig. ..."
2. Medico-physical Works: Being a Translation of Tractatus Quinque Medico-physici by John Mayow (1907)
"And indeed it is probable that the distillation of vitriol will go on as long as
any of the saline particles of the colcothar remain, these being brought ..."
3. The Emporium of Arts and Sciences by John Redman Coxe (1815)
"colcothar: CROCUS MARTIS: SAFFRON OF MARS. This is an oxyd of iron, made red by
exposing it to heat, and used for polishing brass and iron utensils, ..."
4. A Practical Treatise on the Manufacture of Colors for Painting: Comprising by Jean René Denis Riffault des Hêtres, Armand Denis Vergnaud, G. Alvar Toussaint (1874)
"colcothar is also produced by the wet way, in mixing a solution of sulphate of
iron with another of carbonate or, better still, bicarbonate of soda. ..."
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