Here's a virtually weightless, rigid 600gsm board made of a polystyrene foam core laminated on both sides with a white coated-paper stock. It makes a wonderful back-up for large framed work and a great mounting board for posters. Or use it for tabletop displays and signs. Formakote cuts easily with a mat knife or utility knife and can be scored and folded for three-dimensional work size: 900mm x 640mm. Sheets sold singly.