Blacking may refer to:
Blacking (polish), a nineteenth-century shoe polish Blacking up, putting on a style of theatrical makeup to take on the appearance of certain archetypes of American racism Blacking (cryptography) In NSA jargon, encryption devices are often called blackers, because they convert red signals to black Sanitization (classified information)
People with the surname John Blacking (1928–1990), British ethnomusicologist and anthropologist
See also Blackening (disambiguation)