Offset printing is usually the choice when your design incorporates complicated color and shading such as in photographs and gradients, or when you do not wish to have thin metal lines separating the colors and text.

This process offers exact full-color reproduction of complicated originals with crisp coloring and details. Using a CMYK printing process (similar to high-end magazine printing), the art is printed on a substrate such as paper, vinyl, or mylar and then that substrate is applied to a thin metal pin.  A hard epoxy dome is usually applied to protect the artwork and to insure a durable glossy finish.

Note: Many people confuse offset printing with silkscreen printing because both involve printing the design without the need for thin metal lines separating the colors, but it is important to realize that these two processes are fundamentally different.   Offset printing is used for complex artwork with gradual colors and many details.  Silkscreen printing is used for simpler artwork with a small and identified number of continuous colors.