chrome alum
Americannoun
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Also called ammonium chrome alum;. Also called ammonium chromic sulfate. a green, crystalline, water-soluble powder, chromium ammonium sulfate, CrNH 4 (SO4 ) 2 ⋅12H 2 O, used chiefly as a mordant in dyeing.
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a violet, crystalline, water-soluble powder, potassium chromium sulfate, CrK(SO4 ) 2 ⋅12H 2 O, used chiefly as a mordant in dyeing.
noun
Example Sentences
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The difference between chrome alum and alum crystals is principally that chrome alum has twice the strength of alum crystals, being a double salt, instead of the commercial alum usually sold.
From Harper's Round Table, August 13, 1895 by Various
They are: manganese dioxid, copper sulfate, cobalt chlorid, nickel salts, chrome alum, and silver nitrate.
From Common Science by Ritchie, John W. (John Woodside)
The mixture should be employed immediately after adding the chrome alum.
From Photographic Reproduction Processes by Duchochois, Peter C.
Photo-lithographic transfer paper and ink are prepared in the following manner:—The paper is treated with a solution of a hundred parts of gelatine and one part of chrome alum in 2,400 parts of water.
From Paper and Printing Recipes A Handy Volume of Practical Recipes, Concerning the Every-Day Business of Stationers, Printers, Binders, and the Kindred Trades by Ford, J. Sawtelle
On evaporating the solution these substances crystallize out as potassium chrome alum, which substance is produced as a by-product in the industries using potassium dichromate for oxidizing purposes.
From An Elementary Study of Chemistry by McPherson, William
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
