bluing

also n.

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.

The addition of a small amount of clean blue colorant to a white paint to promote the visual perception of whiteness.

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IN BRIEF: A substance used to whiten clothes or give them a tinge of a certain color.

After washing our sheets with a bluing solution, they were whiter than they had ever been.

Note: click on a word meaning below to see its connections and related words.

The noun has 2 meanings:

Meaning #1: used to whiten laundry or hair or give it a bluish tinge
  Synonyms: blueing, blue

Meaning #2: a process that makes something blue (or bluish)
  Synonym: blueing

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