Three-dimensionally shaped object forming sheet, three-dimensionally shaped object and production method for same, and production method for decorated three-dimensional object

A production method for a three-dimensionally shaped object having unevennesses in a surface, the method comprising sequentially performing:

• a base laminating step of producing a base by laminating together a second base and a first base having greater elasticity than an elasticity of the second base;
• a thermally expansive layer forming step of forming, on one side of the base, a thermally expansive layer that distends at a predetermined temperature or higher on;
• a photothermal conversion layer printing step of forming a photothermal conversion layer for converting absorbed light to heat and releasing the heat, on at least one surface of a side of the base and a side of the thermally expansive layer;
• and
• a light irradiation step of irradiating light so as to reach the photothermal conversion layer thereby causing the thermally expansive layer in a region where the photothermal conversion layer is formed to distend.

A production method for a decorated three-dimensional object having unevennesses in at least a portion of a surface, the method comprising sequentially performing:

• a base laminating step for producing a base by laminating a second base and a first base having higher elasticity than an elasticity of the second base;
• a thermally expansive layer forming step of forming, on one side of the base, a thermally expansive layer that distends at a predetermined temperature or higher;
• a photothermal conversion layer printing step of forming a photothermal conversion layer for converting absorbed light to heat and releasing the heat, on at least one surface of a side of the base and a side of the thermally expansive layer;
• and
• a light irradiation step of irradiating light so as to reach the photothermal conversion layer thereby causing the thermally expansive layer in a region where the photothermal conversion layer is formed to distend;
• and
• an affixing step of affixing another side of the base to a surface of an article.