High Contrast Da-Tex is a unity gain rear projection surface with a specially designed dark gray tint and is formulated to provide lower black levels for today's high output projectors. This surface features optical characteristics similar to rigid rear projection screens. Ideally suited for both lace and grommet and snap button screens used in portable applications. Surface requires tensioning due to its flexible nature. Screen surface can be cleaned with mild soap and water. Flame retardant and mildew resistant. Viewing Angle: 40° Gain: 1.0.