Abstract: A method and apparatus for removing the skins or hulls from seeds, including those of legumes, grains, drupes, silques, and achenes involves wetting the seeds with an alkaline solution and then with a peroxygen solution. The two substances react underneath the skin to liberate gas between the seed meat and the skin. The gas bubbles blister the skin, causing it to become loosened. Slight mechanical action is used to dislodge the blistered skins from the seed meats.

Abstract: A method and apparatus for bleaching the shells of in-shell nuts and for bleaching the meats of shelled nuts involves wetting the nuts with an alkaline solution and then with a peroxygen solution. The two substances react to form a bleaching agent which whitens the shell or nut meat. Slight mechanical brushing may be used to dislodge debris loosened by the process. The apparatus includes means for recycling the reagents through the system without causing the desired temperature and concentration of the reagents to deviate significantly from predetermined values.