Like MDF, these are affordable materials to use on the laser cutter. They are quick to cut, easy to stick together due to their porous nature and take paint and colour well.
Greyboard cuts with a very sooty edge, so may end up smudged, whereas corrugated card and mountboard are a lot cleaner.
We stock 1.4mm mountboard in a few commonly used colours but can order in a wide variety of colours in A1 size, 2mm Corrugated Cardboard in A1 and 1mm and 2mm Greyboard in A1 and A2 size.