The Study on the Hardness of Ointment(IV) -Influences of Temperature on the Apparent Logarithmic Hardness of Ointments-

연고제(軟膏劑)의 경도(硬度)에 관한 연구(硏究)(IV) -온도(溫度)의 변화(變化)가 연고제(軟膏劑)의 대수경도(對數硬度) 미치는 영향(影響)-

The relationship between temperature and apparent logarithmic hardness of ointments were clearly demonstrated. The followings were obtained as the results: 1. When the ointment base was mixed with additives and heated or cooled at various temperatures, the apparent logarithmic hardness in the first trend before reaching the critical point is subject to change mainly by the contents of the additive while in the secondary trend after reaching the critical point is subject to change mainly by the temperature. 2. No Change in the critical point was observed at different temperatures. It is assumed that the crittical point of such ointment bases has no relationship with temperatures and that the critical point itself should rather depend on the physicochemical properties of the additives.