Hupfu (shell powder) zvinoreva hupfu hunogadzirwa nekupwanya nekukuya matemhe.95% yezvigadzirwa zvayo ndeye calcium carbonate, chitin, uye zvishoma zveamino acids uye polysaccharides.Inogona kushandiswa sezvigadzirwa zvepamusoro zvechikafu, zvizoro uye zvekushongedza kwemukati, uye inoshandiswa muzvipfuyo nehuku.Kudyisa uye chikafu che calcium source additives, jewelry processing, desiccants, nezvimwe.