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blu·ingalso blue·ing (blo͞o′ĭng)
1. Any of various coloring agents used to counteract the yellowing of laundered fabrics.
2. A rinsing agent used to give a silver tint to gray or graying hair.
or blue•ing(ˈblu ɪŋ)
a substance, as indigo, used to whiten clothes or give them a bluish tinge.
Bluing was a blue dye that was put in the rinse water in very dilute quantities before the days of bleach to counteract the yellowing of cotton goods generally observed after washing. A blue light of the proper intensity combines with yellow light to give a near white. (Note that this effect involves the mixing of light, not pigments.) The yellowing was mainly caused by the soaps that were available before the age of detergents when very harsh soaps were the standard.
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|Noun||1.||bluing - used to whiten laundry or hair or give it a bluish tinge|
|2.||bluing - a process that makes something blue (or bluish)|