blueing
verb(blue)
to make (something) blue in color: such as
blueing
verb(blue)
to dye, tint, or paint (something) blue
blueing
verb(blue)
to heat (iron or steel) to about 550 to 600 degrees Fahrenheit so that it acquires a protective bluish coating
blueing
noun(blue)
a preparation used in laundering to counteract yellowing of white fabrics