Whitewash

:"Whitewashing," is a common term for Censorship

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Whitewash is a type of inexpensive paint made from slaked lime (Calcium hydroxide, or Ca(OH)2) and chalk (whiting). Other additives have historically included milk, flour, salt, glue, water glass and soap. Whitewash cures through a reaction with carbon dioxide in the atmosphere to form calcite.

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It is usually applied externally, as Tom Sawyer was famously made to do to a fence in Mark Twain's The Adventures of Tom Sawyer. Occasionally it is colored and used on interiors, such as the hallways of apartment buildings. Whitewash is especially effective on adobe-like materials because it is absorbed easily and the resultant chemical reaction hardens the substrate.

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Lime wash is pure slaked lime in water. It produces a unique surface glow due the to refraction of calcite crystals.

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Paint: :...

Slaked lime: REDIRECT calcium hydroxide...

Calcium hydroxide: Calcium hydroxide is a chemical compound with the chemical formula Ca(OH)2. It is a colorless crystal or white powder, and is created when calcium oxide (called lime or quicklime, but unrelated to the citrus fruit (lime)) is with water. A traditional name for calcium hydroxide is slaked lime. It is...