The pack of watercolor cardstock is perfect for working with water- based media. It is a robust, good quality surface that can withstand repeated wet on wet application. It will allow you to easily mix, blend and re-work your colors. Ideal for use with paints, pencils, markers, spritzers and more! This package contains 50 8.5x11 inch sheets of watercolor cardstock. Acid and lignin free. Imported.