Rosco Cinegel 3010 Opal Tough Frost has similar characteristics to Light Tough Frost, but less dense. Tough, heat resistant base. (Transmission not available).The Rosco Cinegel #3010 Opal Tough Frost Filter (48″x25′ Roll) is meticulously manufactured on a heat-resistant base polymer utilizing a patented deep-dyed technology. On-line computerized colorimetry continuously monitors color and density against strict standards, thus assuring a reliable and consistent product.