A biopolymer curdlan was used as a paint additive to increase fluidity and pigment dispersion in this study. The color density of paint was increased with curdlan addition and the use of pigment could be minimized as a result. Since curdlan is an environmental friendly material, it can be used for special painting system. When curdlan was mixed with pigment and used for painting system, it helped pigment particles scattered equally in the solution. Therefore, there was no defection on the surface of paint and fluidity of paint was almost same for all the surface. Adequate amount of curdlan for improving paint quality and minimizing curdlan usage was important. The optimal curdlan concentration was 0.5 % (w/w). The surface of painted paper was photographed with SEM (scanning electron micrograph). It showed the pigment was uniformly distributed with the addition of curdlan.