Proudly made in the USA. Strathmore 400 Series Marker Paper was carefully developed to offer a quality surface for use with artist markers—for artists who use markers to create finished works of art. This 50.5 lb / 190 g/m2 paper accepts alcohol-based, water-based and solvent-based markers, as well as pen and ink and mechanical pencil. The paper’s smooth surface allows markers to glide easily for even, consistent layering of color and blending. No drag to insure even strokes as well as not chewing up the nibs on your markers. These heavyweight sheets are bleed and tear resistant and acid-free—for vibrant, lasting works of art.