The relationship between powders and apparent logarithmic hardness of ointments were clearly demonstrated. The followings were obtained as the results. 1. Apparent logarithmic hardness of ointment were affected by the powders such as zinc oxide, salicylic acid, soluble starch. and talc. 2. The ointments which are added powder have different two slops, $k_1;and;k_2$. 3. The slopes, $k_1;and;k_2$ were directly correlated and the critical points, were proportional to $k_1;and;k_2$ values. 4. The slope, ka is at least $6{sim}91$ times more sensitive, than the slope, $k_1$, and 25 times more sensitive in average. It was suggested from the results that the quantity of powers which is added to the ointment must be within the critical point.