A JKP endorsed projection screen material, HD Progressive 0.9 is formulated to produce true color and white field uniformity. With a 0.9 gain and an extraordinarily wide half angle of 85 degrees, this screen fabric offers excellent depth of modulation for even the most demanding high definition projection devices. HD Progressive is part of Da-Lite's JKP Affinity line of projection screens. Gain = 0.9, Half Angle = 85 degrees.