A technique used to decorate pottery. In Greek pottery-making, it began in the early 4th century BC. A strip of metal was applied to the pot as it was turned on the wheel, leaving a band of even decoration on the inside; it was more accurately called chattering. Alternatively, a cogged wheel was rotated over the soft clay of a pot to leave a series of impressed dashes at right angles. That method was used especially on Roman pottery and was found on the exterior of vessels, especially on the rim. In India, the technique was used on pottery of rougher fabric and on forms derived from Northern Black Polished wares, possibly beginning in the late 1st millennium BC. The pre-Columbian civilization of the Chavín also used rouletting on its pottery.