GALLIC ACID • FREE-TRANSLATOR.COM • Definition of Gallic acid

"Gallic acid" Quotes from Famous Books

... mixture of gallic acid and oil of vitriol is carefully and gradually heated to 140, a viscid wine-red liquid results. If this be poured into cold water, after cooling, a heavy brown-red granular precipitate is formed, soluble in 3333 parts of boiling water. It dissolves in potash-ley, ...

— Field's Chromatography - or Treatise on Colours and Pigments as Used by Artists • George Field

... vitriol, it must have referred to "gall" ink. Further investigation discloses the fact that such galls were of Chinese origin and as we know they do not contain the necessary ferment which the aleppo and other galls possess for inducing a transformation of the tannin into gallic acid, no complete union could therefore obtain. Hence the value of this composition was limited until the time when yeast and other materials were introduced to overcome ...

— Forty Centuries of Ink • David N. Carvalho

... then a solution of nitrate of silver. Iodide of silver forms, and saturates the paper. The excess of nitrate of silver and the heavy yellow powder which forms are now washed off, and the paper is ready for the camera. The picture may be developed by a solution of gallic acid mixed with a very small quantity of an aqueous solution of acetic acid and nitrate of silver. The picture is fixed by washing with hyposulphite of soda. If you wish to derive any pleasure from photography, you ...

— Harper's Young People, December 2, 1879 - An Illustrated Weekly • Various

Words linked to "Gallic acid" : acid