When getting started, remember that your blue mat will be for thinner materials (tissue paper, vellum, computer paper, cellophane, vinyl, acetate…) and your purple mat will be for more substantial materials (cardstock, patterned paper, glittered cardstock, chipboard, cardboard, leather, wood veneer paper…) For a sturdy and accurate cut of fabric, add the fabric support sheet to your purple mat to help preserve the surface of your mat and also add that extra support for fabric to stick to and cut accurate.