Draper's line of diffusion screens offer a transparent substrate of plate glass (Cineglass®) or clear acrylic (Cineplex®) with a permanently-bonded optical coating. Cinescreen Rear Screens® projection screens feature the ability to enhance or lower brightness or contrast for excellent uniformity visible over a wide range of viewing angles. Three optical tint and coating choices of white, neutral grey, and high contrast with varied gains (1.0, 1.3, and 1.5) are available.