Hand screen printing of silk fabrics with a monochlorotriazinyl reactive dye in sodium alginate thickener was investigated through all the printing procedures. Since the properties of the printed materials are characterized by the sharpness of the printings and the fixed dye on fiber, main factors affecting them were examined and discussed. It was shown that the sharpness is dominantly dependent on the concentration of thickener (i.e., viscosity) and RH (relative humidity) in steaming and dye fixation on fiber is relied on the alkali contents in printing paste, RH in steaming and the concentration of thickener.