Examples of a polymer-type emulsification dispersant include polyvinyl alcohol, starch and a derivative thereof, cellulose derivative such as carboxymethylcellulose, methylcellulose and hydroxyethylcellulose, carboxyl group-containing (co)polymer having Mn=1,000 to 50,000 such as sodium polyacrylate, and polymer-type dispersants having a urethane bond or an ester bond described in U.S. Pat. No. 5,