Riverdale Global no spill/zero waste system ensures color container is never opened and features drip-proof connections that keep color completely contained. In Riverdale Gravimetric Stand (RGS), liquid color drum mounts on self-calibrating loss-in-weight scale that continually reports weight of contents to controller. Flow is modulated via air-regulated actuator connected to liquid color pump inside drum, and gravimetric metering holds color-delivery tolerance to within 0.1%.