Alkali blue

any of the class of blue pigments having the highest tinting strength, by weight, of all known blue pigments: used chiefly in the manufacture of printing inks.
Historical Examples

alkali blue B; after dyeing pass through a weak acetic acid bath, then wash well.
The Dyeing of Cotton Fabrics Franklin Beech


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    alkali denaturation test alkali denaturation test n. A test for hemoglobin F, based on the fact that hemoglobin F, unlike other hemoglobins, is not denatured by alkali to alkaline hematin.

  • Alkali feldspar

    alkali feldspar alkali feldspar Any of several feldspar minerals containing alkali metals and little calcium. Plagioclase, orthoclase and microcline are alkali feldspars.

  • Alkali flat

    a level area, as a dry lake bed, in which evaporation has concentrated alkali minerals, as sodium sulfates and carbonates. Historical Examples Ride down the barranca two hundred yards and you’ll come to an alkali flat. The Killer Stewart Edward White The rear of the saloon was partitioned off into a “Ladies’ Room,” whose door […]

  • Alkali grass

    a plant, Zigadenus elegans, of central and western North America, having tough, wiry, bluish-green leaves and greenish flowers.

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