chrome alum

American  

[krohm al-uhm] / ˈkroʊm ˈæl əm /

noun

1. 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.

2. a violet, crystalline, water-soluble powder, potassium chromium sulfate, CrK(SO4 ) 2 ⋅12H 2 O, used chiefly as a mordant in dyeing.

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chrome alum British  

noun

1. a violet-red crystalline substance, used as a mordant in dyeing. Formula: KCr(SO 4 ) 2 .12H 2 O

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Example Sentences

See Examples For:

chrome alum

Then write or draw upon it with an ink containing chrome alum, allow it to dry exposed to light, and immerse the plate in 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

For example, episomorphs of white potash alum and violet chrome alum, of white magnesium sulphate and green nickel sulphate, and of many other pairs of salts, have been obtained.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" 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)

It is made sensitive with a bath consisting of one part of chrome alum, 14 parts of water and 4 parts of alcohol.

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

This he made manifest by looking through a bottle containing solution of chrome alum, when the central portion of the field of view appears of a light red colour for the first second or two.

From Heroes of Science: Physicists by Garnett, William