Mold for use in slip casting method, and method of manufacturing open porous body for use in mold

A method of manufacturing an open porous body for use in a slip casting mold for slip casting a powder material, comprising the steps of:

• stirring a mixture of an epoxy compound having at least one epoxy ring in one molecule, a hardener for reacting with the epoxy compound to harden the epoxy compound, a filler for developing self water absorption capability and mold releasability, and water into an O/W-type emulsion slurry;
• casting the emulsion slurry into a mold impermeable to water;
• and
• hardening the emulsion slurry in the mold while containing the water,
• wherein said filler has an average particle diameter ranging 1 μm to 20 μm, and said hardener is primarily composed of 1-5 wt % of a product produced by a reaction between monomer fatty acid and chain-like fatty primary polyamine and 99-95 wt % of a product produced by a reaction between polymer fatty acid and chain-like fatty primary polyamine.