| abstract |
An example of a build material composition for three-dimensional (3D) printing includes a polyamide material and an antioxidant. The antioxidant includes an aromatic multihydrazide; or an aromatic sulfonomonohydrazide; or a hydrazide having formula (I) disclosed herein, wherein: R is null, a C1 to C12 unbranched alkyl, a C3 to C8 branched alkyl, a C2 to C8 unbranched alkylene, a C4 to C8 branched alkylene, an alicyclic compound, a polyethylene glycol, or a combination thereof; A is C=O, O=S=O, P=O, or C=S; and n is an integer ranging from 1 to 4; or formula (II) disclosed herein wherein A is C=O, O=S=O, P=O, or C=S. |