The necessary pigments needed to achieve the target color are compounded at a high concentration into a “carrier” resin that is the same as, or compatible with, the end use polymeric resin. They are used at a prescribed let-down ratio (LDR) and mixed with a polymer base to be processed into the customer’s finished parts. This is done into a heterogeneous, or salt & pepper, blend and processed by our customers into finished goods. The advantage of this is the ability to mix only the amount of color that is needed. Multiple colors can be blended and produced from one large box (Gaylord) of un-colored (natural) resin. This reduces inventory needs and warehouse space. It does require processing equipment that can adequately mix the color into the plastic resin; a requirement of all coloring options other than pre-color.