This vellum pad features smooth 1000H transparent vellum that retains strength, stability, transparency and printing qualities under exposure to heat, light and atmosphere. Pen and pencil lines come out sharp and clean without feathery edges or ghosting. The paper will not yellow or brittle with age.Details:TransparentAvailable in multiple pad sizes4 x 4 squares per inch50 sheetsFeatures a non-repro blue grid that vanishes when reproduced100% cotton vellum