7,842,319 and 7,842,320 (Nov. 30, 2010), R. Baydo, et al., assigned to Sensient Imaging Technologies, Inc., Escondido, CA.

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Food-grade colored fluids that include food-grade dyes and glycols sprayed on an edible substrate. The food-grade colored fluids may include glycerine and water. In one version, the food-grade glycol makes up at least 25% by weight of the colored fluid, and water makes up no more than 35% by weight.