Projection screens are installations consisting of blank surface and a support structure used for projecting an image for the view of an audience. Projection screens may be permanently installed as in a movie theater, semi-permanent or mobile, as in a conference room or other non-dedicated viewing space. Uniformly white or grey screens are used almost exclusively as to avoid any discoloration to the image, while the most desired brightness of the screen depends on a number of variables, such as the ambient light level and the luminous power of the image source. Flat or curved screens may be used depending on the optics used to
project the image and the desired geometrical accuracy of the image production, flat screens being the more common of the two.

Types of screen fabric finish:
MW - Matt White: The standard to which all other screen surfaces are compared.
Matt white vinyl reflective surface laminated to tear-resistant woven fiberglass. A matt white surface diffuses projected light in all directions, so image can be seen from any angle.
Provides accurate color rendition as well as superior clarity. Recommended for use with all high light output projection devices.

GB - Glass Bead: Spherical glass beads embedded in surface provide brighter on-axis
viewing than matt white, within a narrower viewing cone. Glass Bead screens have about
40% more reflectivity than othe screens, so picture is more rich and lumiscent.