PLEASE NOTE: The ink is not suitable for stamping onto glossy surfaces coated card or clothing. Whilst we can supply your stamp with the required wording, to avoid possible fraudulent use car service stamps, Doctor stamps will only be posted to the address on the stamp. This is a Large Sized Premium Stamp - The Imprint 13 stamp can fit six Lines of Address on your personalised Rubber stamp. A self-inking stamp is a rubber stamp inside of a mechanism that contains a spring, stamp and a pad. The stamp rests on the pad when it’s not being used. This way when you want use the stamp it is ready to go. Since the stamp is resting on the stamp pad all the time with pressure, it causes a couple of problems. First, it places an impression in the pad, if you want to change the stamp on your self inking mount, it is advisable to change the pad also. If the pad is not replaced your stamp may not work correctly. Second, the pad over time will wear out. I suppose this isn’t really a problem. That happens to every stamp pad eventually. They are extremely durable so they have a longer shelf life than most stamps as well. Self inking rubber stamps offer up more space to work your creativity on than regular stamps. Equivalent self-inking stamps are: Colop Printer 40, Trodat 4913, Maxum Mark 3, Shiny S844.