Mortar can be tinted to blend or to contrast with the brick color. It is important to keep mortar mixing and tooling practices uniform, especially when using colored mortar. A slight variation in mortar color can have a dramatic effect on the appearance of a finished wall.
O-Card The O-Card is a Slip Case with an opening at both ends. Both the O-Card and Slipcase can be used to package multiple disc sets or single cases and packs and make you product feel a little more exclusive.
A smart card. A smart card is a card with a microchip in it. Such cards are used as a method of identification and authentication. Plastic cards that allow to withdraw money from a cash machine often are smart cards nowadays (Some of them still have a magnetic stripe which holds the same information). The very often the user is identified with a PIN.