SUPERSMOOTH PET GREYBACK Features: SuperSmooth™ PET GreyBack is a non-curling banner with a super smooth surface optimized for high resolution printing. The grey backing also prevents light transparency and shadowing, giving you brilliant, true-to-life images. Perfect for special event displays and close viewing indoor applications, this material requires no lamination and is available in matte finish with widths from 38″ – 126”.