Chromolux Cardboard 280 gsm. Chromolux Cardboard is a very high quality, wood free crafting cardboard. It is particularly suitable for crafting because of its flexibility. The cardboard is coated with coloured gloss on one side and is white on the back. 50×70 cm – gold or silver – 1 sheet 1/2 folded. 1 sheet – 1/2 folded, 50×70 cm (19.7×25.6 inch), 280 gsm, 2 colours available. colour: 01 gold | 02 silver