Modeling material for forming photofabrication model in ink-jet three dimensional printing, supporting material for supporting the shape of photofabrication model on photofabrication and production method of photofabrication model

A three-dimensional modeling method for forming a three-dimensional fabrication product using an ink-jet three dimensional printing apparatus having a printer head for modeling material for discharging a modeling material onto a modeling table, a printer head for supporting material for discharging a supporting material onto the modeling table, and a light source for curing the modeling material and the supporting material discharged onto the modeling table, the method comprising the steps of:

• discharging a modeling material from the printer head for modeling material and discharging a supporting material from the printer head for supporting material for the formation of respective layers on the modeling table;
• curing the modeling material and the supporting material discharged onto the modeling table by light from the light source to form the layers;
• and
• repeating the steps of the discharging and the curing to shape a three-dimensional fabrication product formed of the modeling material and the supporting material, and
• separating a photocured product of the supporting material from a photocured product of the modeling material to extract the photocured product of the modeling material by immersing the three-dimensional fabrication product formed of the modeling material and the supporting material in water, wherein
• the modeling material discharged from the printer head for modeling material comprises curable resin ingredients (A) to (C) with a weighted average of SP value of 9.0 to 10.3 and a photopolymerization initiator (D),
• wherein curable resin ingredient (A) is a monofunctional ethylenically unsaturated monomer (A), curable resin ingredient (B) is a polyfunctional ethylenically unsaturated monomer containing no urethane group (B), curable resin ingredient (C) is a urethane group-containing ethylenically unsaturated monomer (C), and
• the content of (A) is 50% to 90%, the content of (B) is 3% to 25% and the content of (C) is 5% to 35%, on the basis of the weight of the modeling material, and water-swelling ratio of a photocured product of the modeling material is not more than 1% by weight;
• the supporting material discharged from the printer head for supporting material comprises a water-soluble monofunctional ethylenically unsaturated monomer (F), an alkylene oxide adduct (G) being a water-soluble compound which is compatible with the water-soluble monofunctional ethylenically unsaturated monomer (F) and is incompatible with a photocured product of (F) and/or water, and a photopolymerization initiator (D), and
• the content of (F) is 3% to 45% and the content of (G) is 50% to 95%, on the basis of the weight of the supporting material.