Premium Sanded Pastel Paper by UArt provides pastel, color pencil, and charcoal artists with a reliable, durable foundation that allows for layering and correcting. This premium paper accepts under painting from a wide variety of media including water, oil, and alcohol. Its strong and sturdy surface ensures liquids do not damage the tooth or seep through to the other side. UArt Sanded Pastel Paper is pH neutral and acid-free. This high-quality pastel paper is engineered to eliminate a high percentage of lignin and neutralized to prevent fading and yellowing over time. The acid-free process also provides environmental benefits by recycling and reusing wastewater. 400 grade sheets measure 21 in. x 27 in. and are sold as a pack of 5 sheets.