A method for manufacturing a mold, including steps of (a) expanding a powder mixture containing a water-soluble inorganic salt powder and a water-soluble organic polymer powder in a plane on a table and then selectively spraying a spray liquid containing at least one selected from a water-miscible organic...http://www.google.fr/patents/US7942187?utm_source=gb-gplus-shareBrevet US7942187 - Method for manufacturing mold
