Formation sheet, formation sheet manufacturing method, and shaped object

A manufacturing method of a formation sheet, comprising:

• a first layer stacking step of stacking, on a first main surface of a base, an (n−1)-th thermal expansion layer among n thermal expansion layers stacked on the first main surface of the base, the n thermal expansion layers that each include a binder and a thermal expansion material that expands due to heat, n being an integer greater than or equal to two;
• and
• a second layer stacking step of stacking an n-th thermal expansion layer on the (n−1)-th thermal expansion layer, wherein
• among post-expansion average particle sizes of the thermal expansion material included in each of the n thermal expansion layers, a post-expansion average particle size of the thermal expansion material included in the n-th thermal expansion layer is smallest.

A shaped object comprising:

• a base;
• and
• n expanded thermal expansion layers that each include a binder and an expanded thermal expansion material, the expanded thermal expansion layers being stacked on a first main surface of the base, n being an integer greater than or equal to two, the expanded thermal expansion layers that each have unevennesses on a surface opposing the base, wherein
• among average particle sizes of the expanded thermal material included in each of the n expanded thermal expansion layers, an average particle size of the expanded thermal expansion material included in an n-th expanded thermal expansion layer is smallest.