Rosco's premium filter range, introduced in Europe in 1976. The original high temperature filter, Supergel's unique engineering gives it unsurpassed color durability and heat resistance. Selected by designers for its superior range of colour, Supergel is made from body colored, extruded polycarbonate -- a unique, engineered colour filter providing the longest lasting colour available. It offers incredible durability and meets the most stringent international guidelines for fire retardance, including the B1 and M1 standards.