Reminiscent of days spent in a traditional darkroom, FB Gold Silk 315 Baryta Paper from PermaJetUSA, available here in a 25-pack of A3+ sheets, has a heavy 315 gsm fiber base with a barium sulphate coating that will help produce images with deep blacks and smooth whites. The 12.2 mil thick paper offers a silky satin finish as well as a warm tone that emulates traditional darkroom papers. Also, it has a rated whiteness of 101% and is both acid-free and water resistant for longevity.