Abstract: The present invention relates to a method of preparing dye from natural materials. The dye derived from the method of the present invention may be used in the cosmetic, pharmaceutical and food industries.

Abstract: A method and an apparatus for preparing an alimentary granular soft caviar similar to black (granular) caviar. The method involves the preparation of a mixture containing an albuminous colloid, water, and alimentary gelatin to form the grains, exposing the grains to tea water, dye-stuff, salt solution and gustatory components. The grains of caviar are obtained by supplying the mixture under pressure through gauged channels to a cavity with heated vegetable oil in its upper section, separating and washing the grains, tanning the grains in a tea extract, water washing, washing with salt solution, introducing to the product of a gustatory component in an amount not less than 10% of the total weight of the product and mixing the grains with vegetable oil. The albuminous colloidal solution is soy milk, foremilk of mammals, or a mixture of these components, a mixture of cow/soy milk, or whey of soy or cow milk. The grains are dyed by immersion in an extract from the rind of green walnuts.