How to Use: Peel off the protective film from the sublimation square coaster blank, then use heat transfer tape to attach the image. Heat at 355-375℉/180-190℃ for 60-70 seconds,use heat sublimation paper for best results. Great Quality: Sublimation square coaster blanks made from sturdy MDF with non-slip cork backing, these coasters resist deformation, falls, and are waterproof. They offer excellent insulation and clear, vivid heat transfer patterns. Customised Photo: Heat Transfer Cup Coaster allows you to choose your favourite photos, and with some simple techniques and crafts, you can get handmade crafts and decorations. Place them and add a bright scenery to your cosy home. Sublimation Coasters Blanks Set: You receive 24 pieces of MDF Cork Back Heat Transfer Cup Coasters measuring approximately 3.9 x 3.9 x 0.16 inches/10 x 10 x 0.4 cm, enough quantity for your daily use and replacement. Ideal Crafts: Wood hardboard coasters are ideal for teacups, wine glasses, coffee mugs, and more. Customize with memorable photos for personalized gifts or decorations for any occasion such as weddings, birthdays, and graduation, Christmas.