. "composed etherified dextrin, starch and derivatives thereof, cellulose derivatives such as carboxymethylcellulose, carboxyethylcellulose, methylcellulose and hydroxyethylcellulose, casein, gelatin, polyvinyl pyrrolidone, vinyl acetate/crotonic acid copolymer, styrene/maleic acid copolymer, alginic acid and alkali metal salts, alkali earth metal salts and ammonium salts thereof, polyacrylic acid, p" . . .