Skulbone prints with a process called discharge printing. Discharge printing is a rarely used printing process that involves printing on a dark colored garment "blind". When printing, the ink is actually transparent on the shirt and when it's dried, the process pulls the dye out of the shirt and leaves the ink color behind. The very cool thing about this process is the ink becomes the shirt. Instead of coating the shirt like the industry standard process: which cracks, flakes off and is quite uncomfortable on the more sensitive areas of the chest.