black flux

noun

, Metallurgy.

1. a reducing flux consisting of finely divided carbon and potassium carbonate.

Example Sentences

Tartar and "black flux," are reducing agents as well as fluxes.

From Project Gutenberg

The "black flux," which may be obtained by heating tartar, is a mixture of carbonate of potash and charcoal.

From Project Gutenberg

Black flux is obtained when equal parts of nitre and tartar are deflagrated.

From Project Gutenberg

It melts at the flame of a candle, and may be reduced when heated along with iron or black flux, which are distinctive characters.

From Project Gutenberg

Charcoal or even oil may be substituted for black flux, and a retort of hard glass may be used, with the same result.

From Project Gutenberg