Abstract: A capsule and process for the production of a colored gelatin capsule by homogeneously dispersing in the gelatin carminic acid or laccaic acid and ammonium alum and/or potassium alum, and further incorporating titanium dioxide in the gelatin. Preferably, a gelatin capsule in which the amount of carminic acid or laccaic acid is 0.03 to 0.75% by weight and the amount of ammonium alum and/or potassium alum is 0.01 to 0.25% by weight.

Abstract: Pharmaceutical capsules with telescopically engaged body and cap portions, also known as hard shell capsules, having enteric properties. The capsule body and cap portions are formed by dip-molding using a homogeneous film-forming mixture comprising (1) hydroxypropyl methylcellulose and an ammonium salt of cellulose acetate phthalate polymer, or (2) gelatin and an ammonium salt of a copolymer of methacrylic acid and methacrylic acid alkyl ester; optionally with the inclusion of plasticizer and/or coloring agent. The capsules are soluble in or disintegrated by the alkaline intestinal secretions but are substantially insoluble or resistant to solution in the acid secretions of the stomach.