Yupo Medium Artist Panels feature 74 lb. Yupo paper made from 100% polypropylene that is laminated onto a 1/8" thick Aluminum panel, providing portability and stability. The Yupo Artist Panel is completely archival, acid-free and will not bend in any way. This format allows the professional and aspiring artist to elevate and enhance their creative work. It offers a fresh, clean and contemporary look that is ready to frame. Yupo Medium is ideal for watercolor, alcohol inks, acrylics, pencils and markers.