4 Color Process is very useful for multi-color photographic like prints. 4 Color process is a color separation technique that combines cyan, magenta, yellow and black to reproduce the entire spectrum or gamut of colors found in the image. Process color printing usually requires more then just the 4 basic CMYK colors for a quality print. Adding a highlight white helps to control the lighter color ranges. Additional custom colors may also be included for spot color matching or out of gamut colors. Advantages: Unlimited color prints / reduces costs for multi-colored designs (5+) Disadvantages: Prints on very light colored fabrics only / cannot guarantee pantone color match