Three-dimensional printing with wetting agent

A three-dimensional printing kit comprising:

• a wetting agent including:
• from 0 wt % to about 49.8 wt % water,
• from about 0.2 wt % to about 60 wt % film-forming organic solvent having a boiling point from greater than about 100° C. to about 350° C., and
• from about 30 wt % to about 99.5 wt % amphiphilic water-miscible solvent having a boiling point from about 45° C. to less than about 100° C.;
• a binding agent including from about 2 wt % to about 30 wt % of a polymer binder dispersed in an aqueous liquid vehicle;
• and
• a particulate build material including from about 80 wt % to 100 wt % metal particles, ceramic particles, or both metal particles and ceramic particles.

A method of three-dimensional printing comprising:

• iteratively applying individual build material layers of a particulate build material onto a powder bed, the particulate build material from about 80 wt % to 100 wt % metal particles, ceramic particles, or both metal particles and ceramic particles;
• based on a 3D object model, iteratively and selectively applying a wetting agent to individual build material layers, wherein the wetting agent includes from 0 wt % to about 49.8 wt % water, from about 0.2 wt % to about 60 wt % film-forming organic solvent having a boiling point from greater than about 100° C. to about 350° C., and from about 30 wt % to about 99.5 wt % amphiphilic water-miscible solvent having a boiling point from about 45° C. to less than about 100° C.;
• and
• based on a 3D object model, iteratively and selectively applying a binding agent to individual build material layers to define individually patterned object layers that become adhered to one another to form a layered green body object, wherein the binding agent includes from about 2 wt % to about 30 wt % of a polymer binder dispersed in an aqueous liquid vehicle.