Three-dimensional printing

A method for three-dimensional (3D) printing, comprising:

• applying a build material composition to form a build material layer, the build material composition including one of:
• (i) a thermoplastic elastomer having a flow parameter characterized by a consolidation resistance value ranging from about 8 to about 30, and a tap density characterized by an n1/2 value ranging from 5 taps to 30 taps;
• or
• (ii) a polyamide material selected from the group consisting of polyamide 12, polyamide 11, polyamide 6, polyamide 13, polyamide 6,13, polyamide 12 mixed with or encapsulating glass (polyamide 12-GB), and a combination thereof, the polyamide material having a flow parameter characterized by a consolidation resistance value ranging from about 75 to about 120, and a tap density characterized by an n1/2 value ranging from 5 taps to 30 taps;
• based on a 3D object model, selectively applying a fusing agent on at least a portion of the build material layer;
• and
• exposing the build material layer to electromagnetic radiation to coalesce the build material composition in the at least the portion to form a layer of a 3D object.

A method for three-dimensional (3D) printing, comprising:

• based on a 3D object model, selectively applying a core fusing agent on at least a portion of a first layer of a build material composition, the build material composition including one of:
• (i) a thermoplastic elastomer having a flow parameter characterized by a consolidation resistance value ranging from about 8 to about 30, and a tap density characterized by an n1/2 value ranging from 5 taps to 30 taps;
• or
• (ii) a polyamide material selected from the group consisting of polyamide 12, polyamide 11, polyamide 6, polyamide 13, polyamide 6,13, polyamide 12 mixed with or encapsulating glass, and a combination thereof, the polyamide material having a flow parameter characterized by a consolidation resistance value ranging from about 75 to about 120, and a tap density characterized by an n1/2 value ranging from 5 taps to 30 taps;
• exposing the first layer to electromagnetic radiation to fuse the build material composition in the at least the portion of the first layer to form a core layer;
• applying a second layer of the build material composition on the core layer;
• based on the 3D object model, selectively applying a primer fusing agent on at least a portion of the second layer, the primer fusing agent including a plasmonic resonance absorber having absorption at wavelengths ranging from 800 nm to 4000 nm and having transparency at wavelengths ranging from 400 nm to 780 nm;
• and
• exposing the second layer to electromagnetic radiation to fuse the build material composition in the at least the portion of the second layer to form a primer layer.