Hewlett-Packard Development Company, L.p.

Peridot Print LLC

Jason Christopher Butler

Graciela Emma Negri Jimenez

Shannon Reuben Woodruff

Emre Hiro Discekici

Alexey S Kabalnov

Stephen G Rudisill

Jesiska Tandy

An example of a jettable antioxidant formulation is for three-dimensional (3D) printing. The jettable antioxidant formulation includes an antioxidant blend; a surfactant, a dispersant, or a combination thereof; a water soluble or water miscible organic co-solvent; and water. The antioxidant blend consists of a primary antioxidant and a secondary antioxidant.

Three-dimensional printing

The present disclosure is drawn to food contact compliant three-dimensional printing kits and systems. In one example, a multi-fluid kit of food contact compliant agents for three-dimensional printing can include a food contact compliant fusing agent and a food contact compliant detailing agent. The fusing agent can include from about 70 wt % to about 96 wt % water, a food contact compliant carbon black dispersion in an amount of from about 3 wt % to about 10 wt % by solids weight of the carbon black dispersion, and food grade propylene glycol in an amount from about 1 wt % to about 15 wt %. The detailing agent can include from about 70 wt % to about 90 wt % water, food grade propylene glycol in an amount from about 10 wt % to about 25 wt %, and a food contact compliant chelating compound in an amount of from about 0.01 wt % to about 1 wt %.

Three-dimensional printing with food contact compliant agents

The present disclosure describes multi-fluid kits for three-dimensional printing, three-dimensional printing kits, and methods of making three-dimensional printed objects. In one example, a multi-fluid kit for three-dimensional printing can include a fusing agent and an antioxidant agent. The fusing agent can include water and an electromagnetic radiation absorber that absorbs radiation energy and converts the radiation energy to heat. The antioxidant agent can include a liquid vehicle with water and from about 0.5 wt % to about 15 wt % hindered phenolic antioxidant dispersed in the liquid vehicle.

Three-dimensional printing with hindered phenolic antioxidants

The present disclosure describes multi-fluid kits for three-dimensional printing, three-dimensional printing kits, and methods of making three-dimensional printed objects. In one example, a multi-fluid kit for three-dimensional printing can include a fusing agent and an antioxidant agent. The fusing agent can include water and an electromagnetic radiation absorber. The electromagnetic radiation absorber can absorb radiation energy and convert the radiation energy to heat. The antioxidant agent can include water and a dispersion of a secondary antioxidant.

Three-dimensional printing with secondary antioxidants

Disclosed herein are compositions for three-dimensional printing. In an example, disclosed herein is a composition for three-dimensional printing comprising: (A) a powder build material; (B) a first fusing agent; (C) a second fusing agent different from the first fusing agent; (D) a detailing agent; (E) a cyan ink composition; (F) a yellow ink composition; (G) a magenta ink composition; and (H) a black ink composition.

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SAN DIEGO, CA, United States of America

Jason Christopher Butler