Diffusion cloth is a taffeta like translucent  fabric, inherently flame
retarded 100% Trevira CS with a slight sheen. Suitable for front
and rear projection,  available  in white, 3.2m and 5.16m wide. 
Can also be painted and back lit.

weight:  80gsm
width: 320cm and 520cm
100% Trevira CS  IFR
thickness: 0.14mm
piece length: 60m

colours: white (stock), other colours by indent

Diffusion cloth is offered as an inexpensive alternative to PVC
screen surfaces, it works well in areas with controlled ambient
light. The fabric is light and translucent, and used mainly for rear
projection applications; as with any rear projection surface the
projector should be positioned to avoid a hot spot in the direct
viewing area. For best results the fabric should be stretched, as
it may hold creases. It is possible to press the fabric (cool iron).

comparison of diffusion cloth and grey rear projection pvc

painted diffusion cloth back drops for a museum exhibition,
translucence allows soft rear flood lighting to mimic fade from day to night