Q. Spot Artwork Vs. Process Art

A. Sport Artwork:

Spot color graphics are produced by printing one color at a time. The inks used in spot color printing are opaque and are referenced by the Pantone Matching System (PMS) for color accuracy. There's no limit to the number of spot colors that can be printed to produce a final image.
Process Artwork:
A process of printing 4 transparent colors (inks) to achieve a full color or photographic image. These colors are layered over one another which produces the entire range of colors that make up the final image.