ALR typically stands for Ambient Light Rejection, and it is a technology used in projection screens to improve image quality in environments with varying levels of ambient light.
A grey ALR screen could refer to a projection screen with ambient light rejection properties that has a grey tint/grey fabric. Grey colour fabrics is often chosen to enhance contrast and black levels in a brightly lit room. These screens are designed to reflect less ambient light while maintaining good visibility of projected content.
For the latest and more specific information about "Grey ALR Screens" contact Inlight Projection Screens (9958895198)