When used with other non-fiber forming polysaccharides such as iota and kappa carrageenan, carboxymethyl cellulose, pectins and alginates, which alone do not self-assemble under appropriate conditions with proteins to form fibers, the proportions of fiber-forming polysaccharide such as lambda carrageenan to the non fiber-forming polysaccharide should be sufficient to provide spontaneous fiber form