Designed with 10 mil naturally bright white base, Epson Proofing Paper White Semimatte is free of optical brighteners & ideally suited for proofing a wide variety of color critical commercial offset printing applications most commonly used in high-end sheetfed printed products such as brochures, collateral, book covers & posters. Coated with exacting standards, Proofing Paper White Semimatte is specifically optimized for proofing applications using Epson Ultra Chrome K3 ink & displays outstanding short term stability. Its weight, base tint, & wide color gamut makes this the perfect choice for commercial proofing applications. Like all of Epson's innovative media, this paper is engineered to give you the highest resolution & color saturation possible. As always, EPSON supplies guarantee EPSON quality.