Tim Holtz Alcohol Ink YUPO Bulk Pack is a versatile surface specially suited for watercolor and mixed media techniques using Tim Holtz Alcohol Inks, Alcohol Pearls, Mixatives, and Blending Solution. YUPO is a smooth, synthetic, surface that resists buckling and dries quickly. This Bulk Pack Contains 25 Sheets but is also available in packs of ten 5 x 7 inch sheets in Translucent, White and White Heavystock as well as five pack of 8 x 10 inch sheets in White, Translucent, and White Heavystock.