Amount of light transmission varies by thickness of sheet. Translucent Cast Acrylic sheet is often referred to as "sign grade", due to its popularity of use in backlit signs and cosmetic applications. The 2051 color is a blue colored translucent acrylic sheet has the unique property of being non see-through, but allowing certain degrees of light transmission. Translucent means the objects placed behind the sheet will be less visible or "blurry". Peel off protective film on both sides, may be paper or plastic film.