Make painting simple and stress-free with School Smart Ink Mixing Trays! Flexible, heavy-gauge clear plastic design comes equipped with walls (to prevent spillage) and neatly holds tubed inks and paints. Construction is great for printmaking and painting techniques, and for dipping and applying contained pigment with brayers or brushes. Each tray measures 6-1/2 x 6-1/2 inches. Sold as 10 per pack.