Fecha de publicación: 15/12/2022 Fuente: WIPO "hemp" Provided herein are hybrid pigments and methods of making the same. The hybrid pigments include a natural polyamide substrate and an acid dye disposed on the natural polyamide substrate. The hybrid pigments are biodegradable, compostable, or both, and provide an environmentally friendly alternative to synthetic polymer particle-based pigments. The natural polyamide substrate comprises at least one of a plant- derived protein and an animal-derived protein. The plant-derived protein comprises at least one of rice protein, hydrolyzed rice protein, soy protein, hydrolyzed soy protein, defatted soy flour, pea protein, hydrolyzed pea protein, wheat protein, hydrolyzed wheat protein, fava bean protein, hydrolyzed fava bean protein, rapeseed protein, hydrolyzed rapeseed protein, hemp protein, hydrolyzed hemp protein, quinoa protein, and hydrolyzed quinoa protein. The animal-derived protein comprises at least one of whey protein, hydrolyzed whey protein, milk protein isolate, casein protein, hydrolyzed casein protein, egg protein, hydrolyzed egg protein, collagen protein, hydrolyzed collagen protein, keratin, feather meal, and fish meal. The acid dye comprises at least one of Acid Yellow 23, Acid Yellow 3, Acid Yellow 73, Acid Yellow 250, Acid Red 50, Acid Red 52, Acid Red 87, Acid Red 92, Acid Blue 9, Acid Blue 25, Acid Blue 45, Acid Red 73, Acid Green 25, Acid Violet 14, Acid Violet 43, D&C Red 40, and FD&C Green 3.