Organic formulations for additive manufacturing of three-dimensional objects containing sinterable materials

A sinterable paste formulation usable as a cast material in a cast-mold process in combination with a mold material formulation, the sinterable paste formulation comprising a powder of a sinterable material, a binder material and an organic vehicle, wherein an amount of said powder is at least 85% by weight of the total weight of the formulation;

• and an amount of water in the formulation is less than 1% of the total weight of the formulation, and wherein said organic vehicle comprises at least one organic material that has an evaporation rate in a range of from 0.3 to 0.8, on an n-butyl acetate scale, in an amount of at least 50% by weight of the total weight of the organic vehicle,
• wherein:
• said powder of said sinterable material comprises a plurality of spherical particles having an average particles size (d50) lower than 20 micrometers;
• said organic vehicle further comprises at least one organic material that has an evaporation rate higher than 2, on an n-butyl acetate scale;
• a total amount of said organic vehicle ranges from 4 to 15% by weight of the total weight of the formulation;
• and
• an amount of said binder material is no more than 10%, by weight of the total weight of said formulation.