Answer:

scrims

Answer	Crossword Clue
SCRIMS	Opaque backdrops
SCRIMS	Theater backdrops
SCRIMS	Canvas glued to panels to prevent shrinking, etc.

SCRIMS	Curtain materials.
SCRIMS	Fabrics.
SCRIMS	Fabrics
SCRIMS	Cotton fabrics
SCRIMS	Backdrops on stages
SCRIMS	Embroidery fabrics
SCRIMS	Certain theatrical curtains
SCRIMS	Upholstery fabrics

SCRIMS	Drops in a theater
SCRIMS	Theater drops
SCRIMS	Theater curtains
SCRIMS	Theater hangings
SCRIMS	Theatre curtains