caused by the extraction of the organic dispersion medium while also making it possible to completely eliminate the organic dispersion medium without causing residual strain or deformation in the molded product application_number US 87239886 A description by the term 34 organic binder 34 or 34 organic dispersion medium 34 herein is meant such binder or medium all or an essential portion of which is constituted by organic materials including acetone and lower alcohols such as methyl alcohol ethyl alcohol n propyl alcohol i propyl alcohol n butyl alcohol i butyl alcohol sec butyl alcohol or t butyl alcohol the critical temperature of carbon dioxide is 31 1 u00b0 c whereas its critical pressure is 75 2 kg cm 2 abs the carbon dioxide in the fluid state having a temperature not lower than this critical temperature and a pressure not lower than the critical pressure is generally called supercritical carbon dioxide carbon dioxide in this state is low in viscosity and high in diffusion speed while showing nil surface tension the basic recognition of the present invention resides in the fact that liquid carbon dioxide directly below the critical temperature is a good solvent for alcohols and ketones for example 100 weight parts of supercritical carbon dioxide at 100 kg cm 2 and 35 u00b0 c can dissolve only 3 5 weight parts of t butyl alcohol whereas the same weight parts of supercritical carbon dioxide at 100 kg cm 2 and 25 u00b0 c can dissolve 12 3 weight parts of t butyl alcohol it is noted that when the temperature is too low the diffusion speed of liquid carbon dioxide is lowered so that conversely the extraction speed with liquid carbon dioxide is lowered therefore it is required that the temperature be lower than the critical.