A curable composition which comprises (A) an organopolysiloxane represented by formula (1)

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(wherein R.sup.1 represents an alkyl group, R.sup.2 represents an alkyl or aryl group, R.sup.3 represents a hydrogen atom or methyl group, Me represents a methyl group, m is an integer of 1-10, and a and b are integers of 1 or larger, a+b being an integer of 3-120), (B) a photopolymerization initiator, and (C) a hydrosilylation catalyst and which has a surface tension at 23° C. of 23-30 mN/m and a viscosity at 23° C. of 5-80 mPa.Math.s.

Described herein are methods and compositions for forming three-dimensional objects via material jetting processes, the methods including the repeated steps of selectively depositing a liquid thermoset material onto a surface from a nozzle of at least one jetting head in a first specified direction and exposing at least a portion of the liquid thermoset material to a source of actinic radiation in order to form a three-dimensional object from the cured thermoset material, wherein the jetting head is configured to eject droplets of the liquid thermoset material from the nozzle at prescribed elevated operating temperatures, and wherein the liquid thermoset material is chosen so as to possessing prescribed viscosity and rheological characteristics.

An ink jet recording method includes a treatment liquid attachment step, in which a treatment liquid is attached to a recording medium, and an ink attachment step, in which a water-based ink composition is attached to the recording medium. An ink jet recording apparatus includes a recording medium support and a heating mechanism that heats the recording medium support. The ink attachment step is carried out with the recording medium supported and heated by the recording medium support. In the ink attachment step, the recording medium is heated so that a surface thereof reaches a maximum temperature of 28.0° C. or more and 45.0° C. or less. The ratio between absorbances A and B (A/B) is 0.5 or more and 0.95 or less, where absorbance A is that of a 0.1% by mass mixture of the water-based ink composition in the treatment liquid, and absorbance B is that of a 0.1% by mass mixture of the water-based ink composition in purified water. The recording medium support has a flat support surface for supporting the recording medium.

An ink jet recording method includes a treatment liquid attachment step, in which a treatment liquid is attached to a recording medium, and an ink attachment step, in which a water-based ink composition is attached to the recording medium. An ink jet recording apparatus includes a recording medium support and a heating mechanism that heats the recording medium support. The ink attachment step is carried out with the recording medium supported and heated by the recording medium support. In the ink attachment step, the recording medium is heated so that a surface thereof reaches a maximum temperature of 28.0° C. or more and 45.0° C. or less. The ratio between absorbances A and B (A/B) is 0.5 or more and 0.95 or less, where absorbance A is that of a 0.1% by mass mixture of the water-based ink composition in the treatment liquid, and absorbance B is that of a 0.1% by mass mixture of the water-based ink composition in purified water. The recording medium support has a flat support surface for supporting the recording medium.

There is disclosed an ink composition for three dimensional (3D) printing. The ink composition comprises: a liquid dispersion of tungsten carbide (WC) particles and cobalt (Co) particles, and, a carrier vehicle for the dispersion of tungsten carbide particles and the dispersion of cobalt particles. The ink composition is of a viscosity usable with ink jet print heads for 3D printing.

There is disclosed an ink composition for three dimensional (3D) printing. The ink composition comprises: a liquid dispersion of tungsten carbide (WC) particles and cobalt (Co) particles, and, a carrier vehicle for the dispersion of tungsten carbide particles and the dispersion of cobalt particles. The ink composition is of a viscosity usable with ink jet print heads for 3D printing.

This disclosure describes substrate(s) formed with a three-dimensional (3D) feature thereon, and method(s) of printing the same. One method includes identifying a plurality of locations on a substrate surface where the three-dimensional feature will be formed, determining a height value of the three-dimensional feature at each location, assigning a grayscale value to each location based on the height value, and applying ink to the substrate surface at each location according to the assigned grayscale value.

This disclosure describes substrate(s) formed with a three-dimensional (3D) feature thereon, and method(s) of printing the same. One method includes identifying a plurality of locations on a substrate surface where the three-dimensional feature will be formed, determining a height value of the three-dimensional feature at each location, assigning a grayscale value to each location based on the height value, and applying ink to the substrate surface at each location according to the assigned grayscale value.

The present invention relates to multifunctional bisacylphosphine oxides, which are useful as photoinitiators, and to compositions comprising said photoinitiators. The invention also relates to a process for photocuring and to articles of manufacture prepared by said process.

The present invention relates to multifunctional bisacylphosphine oxides, which are useful as photoinitiators, and to compositions comprising said photoinitiators. The invention also relates to a process for photocuring and to articles of manufacture prepared by said process.