Discover a great collection of opal acrylic sheets from Sheet Plastics. A durable, premium plastic product our collection of opal acrylic sheets offer extreme versatility and can be cut and shaped to meet your exact requirements. Our opal sheets are available in three thicknesses, 3mm, 5mm and 10mm. The thickness determines how much light is diffused through the sheet with 3mm allowing 40% pass-through, 5 mm allows 35% pass-through and 10 mm 30% pass-through. These sheets are great for creating photography lightboxes, as a secondary glaze to windows or for signage.