Crayon

A crayon (also wax crayon, wax crayon, wax crayon, grease pencil or crayon ) is a write and paint tool of soft wax compounds. When painting a visible film of wax remains on the surface. The high opacity of crayons ensures bright colors. The drawings are largely light - resistant and waterproof.

Was invented by the American Edwin Binney (1866-1934), who first produced in 1903 together with C. Harold Smith. The company he founded by Crayola (formerly Binney & Smith Inc ) is now the world's largest manufacturer of crayons.

The Soviet cosmonaut sat during space flights in zero gravity a plastic jacketed grease pencils as early replacement for wood pencils before they went to use the Space Pens. These pins have the advantage, so to be simple and rigid hardly prone to defects. A disadvantage is the rapid fading of Scripture against the ink. ( See also: Using writing instruments in space )

With crayons scratch images are produced, among others in the school art class, by placing a sheet is first completely painted in bright colors and then painted completely black. The black layer is then partially scraped away, so that the underlying color colorful layer is visible.