Water dispersible support materials for use with a three-dimensional printing system are described herein. In some embodiments, a support material described herein comprises a phase change wax component and an ethoxylated polyethylene having the formula H(CH.sub.2).sub.m(OCH.sub.2CH.sub.2).sub.nOH, wherein m is an integer from 22 to 60 and n is an integer from 2 to 200. In some cases, the phase change wax component and the ethoxylated polyethylene are each present in the support material in an amount of 20-80% by weight.

A three-dimensional (3D) object printing kit includes a polymeric material; a fusing agent including at least 5 vol % of a polar solvent; and a detailing agent. The detailing agent includes a non-polar, hydrophobic substance selected from the group consisting of a non-polar, hydrophobic liquid in its liquid state at a temperature ranging from about 80 C. to about 40 C., and a non-polar, hydrophobic wax having a melting temperature less than 120 C.

A method includes manufacturing a kernel that comprises a quantity of a phase-change material and heating the thermoplastic past a softening temperature thereof. This softening temperature is greater than the phase-change material's melting temperature. The method continues with pressing this heated thermoplastic onto a contact surface of the kernel and the thermoplastic to cool to below its softening temperature. As a result, the thermoplastic assumes a profile that depends, at least in part, on the contact surface's profile. The method continues with separating the kernel from the thermoplastic.