The process of embossing results in raised text from the surface of the material. It's commonly used on such materials as metal and leather.
Dog tag lanyards consist of a beaded lanyard and an embossed stainless steel dog tag. Embossing is the marking method used by the armed forces for creating soldier dog tags. The embossing machinery for dog tags consists of a drum containing male-female dies for letters, numbers and special characters.
The mark in the material is formed when the male-female dies come together. This process is also referred to as metal stamping. Embossing is the most durable of all marking methods since the letters are formed out of the metal and thus won't rub or scratch off. It's typically limited to the application of only letters, numbers and some special characters of the same size.