Riverdale Color manufactures liquid color and additive dispersions for the Plastics Industry. The products and patented technology - PIAD system for weight scale blenders - represent economical option for processors of injection molding, extrusion, blow molding, and rotational molding products. The company was formed in 1985 by the principals who purchased the business, inventory and assets from Grestco Dyes and Chemicals. The company has been doing business in chemicals since the early 1900s and in colorants since the 1960s. Riverdale Color supplies colorants and additives to consumer and commercial markets such as toys, personal care, packaging, housewares, and outdoor products.