What is Opacity in Window Coverings?
Opacity refers to levels of light filtering for fabrics on roman shades, pleated, cellular and roller shades and draperies. Opacity qualities run from very open and light-sheer to semi sheer to light filtering-semi-opaque to opaque (room darkening) to blackout. Opaque coverings can be 1% through 10% with the lower number the less you can see through the fabric and the less light goes through.