. "xample, cellulose derivatives such as methyl cellulose, alkali metal carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropylemethyl cellulose; acrylates such as polyacrylic acids salts; ethylacrylates; polyacrylmaides; natural products such as gelatine, alginates, pectins, tragacanth, karaya, chondrus, agar, acacia; starch derivatives such as starch acetate, hydroxy" . . .