Non Glare Plexiglass P99 acrylic sheets minimize glare and reflection.  Non glare plexiglass has a matte finish on one side to reduce glare which makes it very popular for picture framing and poster framing.  The matte finish diffuses light striking the surface which helps to reduce glare.  For best results, the sheet must be placed against or a small fraction from the picture or artwork. 

Non glare plexiglass/acrylic is a picture/poster/art framing plastic glass, not a window glass.  It is designed to view artwork with minimal distraction of light glare.