Our cartridge paper is acid free and manufactured using a Twin-Wire process to create an even, matte surface with a good tooth. This makes it perfect for drawing and sketching on both sides of the paper with a pencil which is why you will find this Cartridge Paper in all of our White & Off White paper, 150gsm sketchbooks. These packs of cartridge paper would suit art and design classes, artists looking to transfer their ideas from the sketchbook to something frameable, crafts and more.