. . "By first complexing these water soluble, resin insoluble dyestuffs with a polyhydric alcohol, such as glycerine, and subsequently the higher fatty acid ester decaglycerol tetraoleate in the presence of heat, it is possible to prepare a uniformly colored resin solution or paste which can be further cured to form a color tinted transparent plastic film or sheet useful in the packaging of foods, drug" . .