The present disclosure is drawn to multi-fluid kits for three-dimensional printing, three-dimensional printing kits, and methods of making three-dimensional printed articles. In one example, a multi-fluid kit for three-dimensional printing can include a fusing agent, a first reactive agent, and a second reactive agent. The fusing agent can include water and a radiation absorber. The first reactive agent can include a first liquid vehicle and an epoxy compound having multiple epoxide groups. The second reactive agent can include a second liquid vehicle and an amine compound having multiple amino groups.

A method of calibrating an apparatus for generating a three-dimensional object is described in which a calibration substrate is generated by depositing build material and applying energy to the build material to form a fused surface; a calibration pattern is generated on the calibration substrate by depositing an agent on the calibration surface according to a predetermined pattern; and an attribute of the calibration pattern is measured.

A method of calibrating an apparatus for generating a three-dimensional object is described in which a calibration substrate is generated by depositing build material and applying energy to the build material to form a fused surface; a calibration pattern is generated on the calibration substrate by depositing an agent on the calibration surface according to a predetermined pattern; and an attribute of the calibration pattern is measured.

A method of manufacturing a pattern includes providing a pattern of a first liquid on a medium, applying a powder material to the provided pattern, and providing a second liquid to the powder material applied to the first liquid.

A method of manufacturing a pattern includes providing a pattern of a first liquid on a medium, applying a powder material to the provided pattern, and providing a second liquid to the powder material applied to the first liquid.

A method is provided of sintering a green object body to form a manufactured object. The method comprises providing a green object body. The green object body comprises granular construction material bound together by a binder. The method comprises providing a green support body for supporting the green object body. The green support body comprises granular construction material bound together by a binder. The method comprises supporting the green object body with the green support body. The method comprises sintering the green support body together with the green object body supported by the green support body. A method of manufacturing an object, a method of processing object data, a data carrier carrying program instructions and an object data processor are also provided.

Methods for making densified carbon printed articles from carbon powder are described. Three-dimensional binder jet printing is used to make a printed article from the carbon powder. The printed articles are infiltrated with pitch and may be heated to graphitize at least a portion of the pitch to provide a near net shape densified carbon printed article.

Methods for making densified carbon printed articles from carbon powder are described. Three-dimensional binder jet printing is used to make a printed article from the carbon powder. The printed articles are infiltrated with pitch and may be heated to graphitize at least a portion of the pitch to provide a near net shape densified carbon printed article.

The present invention provides methods, processes, and systems for the manufacture of three-dimensional articles made of polymers using 3D printing. A layer of prepolymer is deposited on a build plate to form a powder bed. The deposited powder bed is heated to about 50° C. to about 170° C. Then, a solution of activating agent is printed on the powder bed in a predetermined pattern, and a stimulus is applied converting the prepolymer to the final polymer. After a predetermined period of time, sequential layers are printed to provide the three-dimensional article. The three-dimensional object can be cured to produce the three-dimensional article composed of the final polymers.

The present invention provides methods, processes, and systems for the manufacture of three-dimensional articles made of polymers using 3D printing. A layer of prepolymer is deposited on a build plate to form a powder bed. The deposited powder bed is heated to about 50° C. to about 170° C. Then, a solution of activating agent is printed on the powder bed in a predetermined pattern, and a stimulus is applied converting the prepolymer to the final polymer. After a predetermined period of time, sequential layers are printed to provide the three-dimensional article. The three-dimensional object can be cured to produce the three-dimensional article composed of the final polymers.