As the painting property of slaked lime, such a vicat value, flow value, viscosity and water carrying capacity with four samples commonly used for the plaster in Kochi Prefecture, were measured. ...There is a mutual property having a relationship to the painting behavior, such as vicat value, flow value in parallel, but viscosity, water carrying capacity in reverse. It was considered that the physical properties, as described above are caused mainly by the affinity to the water owing to the surface area and surface composition of slaked lime.