 Archimedean spirals are also used in digital light processing (DLP) projection systems to minimize the "rainbow effect", making it look as if multiple colors are displayed at the same time, when in reality red, green, and blue are being cycled extremely quickly.Additionally, Archimedean spirals are used in food microbiology to quantify bacterial concentration through a spiral platter.They are also used to model the pattern that occurs in a roll of paper or tape of constant thickness wrapped around a cylinder.