Ecobliss blister cards are only printed on one side of the cardboard. The pressure sensitive adhesive on the back of the blister card allows the inner section of the card to be transferred easily. After transferring this part, all sides of the package, front, back and even the part behind the blister, are all showing the printed colors. This unique feature allows the use of inexpensive cardboard, simply because after packing only the front of the printed board is visible. Only pressure, no heat is required to perfectly seal the blister pack.