Three-dimensional printing with microbe-inhibiting agents

A method of making a three-dimensional printed object having anti-microbial properties, the method comprising:

• iteratively applying a particulate build material to a powder bed to form individual particulate build material layers, wherein the particulate build material includes polymer particles;
• based on a three-dimensional object model, selectively applying a fusing agent onto the individual particulate build material layers, wherein the fusing agent includes:
• water;
• and
• an electromagnetic radiation absorber selected from the group consisting of carbon black, a tungsten bronze, a molybdenum bronze, a conjugated polymer, and a combination thereof;
• based on the three-dimensional object model, selectively applying a microbe-inhibiting agent that is separate from the fusing agent onto the individual particulate build material layers in a sufficient amount to form an area having inhibited microbe growth, wherein the microbe-inhibiting agent consists of:
• a metal-containing microbe-inhibiting material selected from the group consisting of silver particles, copper particles, zinc particles, nickel particles, a metal bis(dithiolene) complex, and a combination thereof;
• and
• a liquid vehicle consisting of water, a polar aprotic co-solvent, a thiol surfactant, an anti-kogation agent, and a biocide;
• exposing the powder bed to energy to selectively fuse the polymer particles in contact with the electromagnetic radiation absorber to form a fused polymer matrix at individual build material layers.