A conductive paste that can reduce an increase in electrical resistance caused by stretching of a wiring when the wiring of an electrical circuit and/or an electronic circuit is formed on a surface of a stretchable and/or bendable base material. The stretchable conductive paste includes (A) surface-treated silver particles and (B) a thermoplastic resin. The (A) surface-treated silver particles include a surface-treated layer.

A liquid composition contains an inorganic oxide and an organic solvent represented by the following Chemical Formula 1,

##STR00001## where R.sub.1 and R.sub.2 each, independently represent straight chain alkyl groups or straight chain alkoxy groups, wherein the organic solvent has a topological index chai4v of 0.9 or greater.

A liquid composition contains an inorganic oxide and an organic solvent represented by the following Chemical Formula 1,

##STR00001## where R.sub.1 and R.sub.2 each, independently represent straight chain alkyl groups or straight chain alkoxy groups, wherein the organic solvent has a topological index chai4v of 0.9 or greater.

A printing device includes an ink, an ink heating unit, and an ink discharging unit. The ink includes water, a metal pigment, and a resin. A mass ratio of the resin to the metal pigment is 0.1 or greater but 2 or less. A proportion of the water in the ink is 1% by mass or greater but 30% by mass or less. The ink heating unit is configured to heat the ink. The ink discharging unit is configured to discharge the ink heated.

A printing device includes an ink, an ink heating unit, and an ink discharging unit. The ink includes water, a metal pigment, and a resin. A mass ratio of the resin to the metal pigment is 0.1 or greater but 2 or less. A proportion of the water in the ink is 1% by mass or greater but 30% by mass or less. The ink heating unit is configured to heat the ink. The ink discharging unit is configured to discharge the ink heated.

The present disclosure relates to a piezoresistive ink composition for sensors production. This ink, change linearly their electrical resistivity with an applied deformation and can easily recover when the external applied stress is released. The composition comprises flexible polymers as thermoplastic elastomers from the styrene-butadiene-styrene family (SBS, SEBS or others), nanostructures of carbon or metal, polar solvents and dispersive agents. With this ink, the user can print the sensor with any desired geometry and use different printing techniques, including drop casting, spray, screen and inkjet printing.

The present disclosure relates to a piezoresistive ink composition for sensors production. This ink, change linearly their electrical resistivity with an applied deformation and can easily recover when the external applied stress is released. The composition comprises flexible polymers as thermoplastic elastomers from the styrene-butadiene-styrene family (SBS, SEBS or others), nanostructures of carbon or metal, polar solvents and dispersive agents. With this ink, the user can print the sensor with any desired geometry and use different printing techniques, including drop casting, spray, screen and inkjet printing.

The present invention relates to a bioink for 3D printing, the preparation method, and the usage. Such bioink is a gel made of α-zein, porogen by 0-10% of the weight of zein, ethanol and water. The preparation method consists of: 10-50% zein is dissolved into an aqueous solution containing 40-90% (v/v) of ethanol, then, the porogen by 0-10% of the weight of zein is added, and then, this solution is allowed to stand at 5-95° C. for 1-10 days, or stirred for 30 min-24 hours, and thus, the bioink for 3D printing can be obtained. The conditions applied to prepare such bioink are mild and the method adopted is easy to operate, in addition, the said bioink for 3D printing has good mechanical properties and biocompatibility, which can be applied in the field of biomedicine for preparing tissue engineered substitutes and hemostatic materials by 3D printing at room temperature.

In an example of a method for three-dimensional (3D) printing, a polymeric build material is applied to form a build material layer. A fusing agent is selectively applied, based on a 3D object model, onto the build material layer to form a patterned portion. A hydrophobic agent is selectively applied, based on the 3D object model, onto at least a portion of the patterned portion. The hydrophobic agent includes a lipophilic phase discontinuously dispersed within an aqueous phase by a surfactant, wherein the lipophilic phase includes an organosilane having a central silicon atom coupled to a C6 to C24 aliphatic or alicyclic hydro-carbon and multiple hydrolyzable groups, wherein the organosilane is present in the hydrophobic agent at from about 1 wt % to about 20 wt %. The build material layer is exposed to energy to selectively coalesce the patterned portion and form a 3D object layer having a hydrophobic portion.

A fixer fluid can include a fixer vehicle with water, an NH-type or N-alkylated lactam co-solvent, and a phosphate ester surfactant. The fixer fluid can further include from 0.5 wt % to 12 wt % an azetidinium-containing polyamine polymer dispersed in the fixer vehicle.