Patent ID: 8597422

Claim:
A method of manufacturing a starch-based pigment or filler comprising the steps of: dissolving a starch derivative having a glass transition point of 150° C. to 350° C. in a mixture of a solvent and water so that a solution comprising the starch derivative is formed; bringing the solution into contact with a non-solvent in which the starch derivative is not dissolved so as to precipitate the starch derivative from a liquid phase which is formed from the solvent, the water, and the non-solvent; removing the solvent from the liquid phase; and separating the precipitate from the water and the non-solvent and recovering the precipitate to obtain the starch-based pigment or filler, wherein the solvent is ketone, the non-solvent is at least one non-solvent selected from the group consisting of water, C 1 -C 6 alkanol and C 4 -C 20 alkane, the solvent is used in a minimum amount to dissolve the starch derivative or in an amount of up to 30% by weight more than the minimum amount, a concentration of the starch derivative in the solution is 10-30% by weight, and an amount of the non-solvent used for precipitation is 0.5-10 tunes by weight of the amount of the solvent.