Alcohol-based, edible ink formulations comprising scalenohedral calcium carbonate particles are provided. The calcium carbonate particles can act as a white pigment to impart white color properties to the edible ink formulations. The edible ink formulations can be printed onto a variety of surfaces, including the surfaces of food products such as confectionery products and snack food products.

Alcohol-based, edible ink formulations comprising scalenohedral calcium carbonate particles are provided. The calcium carbonate particles can act as a white pigment to impart white color properties to the edible ink formulations. The edible ink formulations can be printed onto a variety of surfaces, including the surfaces of food products such as confectionery products and snack food products.

The present invention provides solvent-based high opacity inks and coatings. The high opacity inks and coatings comprise one or more binders, TiO.sub.2 pigment, polymeric void hollowsphere particles, and one or more organic solvents. The inks and coatings may also include mica-based pigments and aluminum pigments. The high opacity inks and coatings of the invention are suitable for use on packaging wherein a high opacity ink or coating is needed to, for example, hide undesired visual effects, or to protect the packaged goods.

The present invention provides solvent-based high opacity inks and coatings. The high opacity inks and coatings comprise one or more binders, TiO.sub.2 pigment, polymeric void hollowsphere particles, and one or more organic solvents. The inks and coatings may also include mica-based pigments and aluminum pigments. The high opacity inks and coatings of the invention are suitable for use on packaging wherein a high opacity ink or coating is needed to, for example, hide undesired visual effects, or to protect the packaged goods.

A method of manufacturing a paste according to various embodiments of the present disclosure for resolving the above-described problems is disclosed. The method of manufacturing a paste may include an operation of adding a metal conductor and a multi-walled carbon nanotube (MWCNT) to chloroform (CHCl.sub.3) to produce a first mixture, an operation of adding polydimethylsiloxane (PDMS) to the first mixture to produce a second mixture, an operation of evaporating the chloroform in the second mixture to acquire a third mixture, and an operation of adding an additional additive to the third mixture to produce a paste.

A method of manufacturing a paste according to various embodiments of the present disclosure for resolving the above-described problems is disclosed. The method of manufacturing a paste may include an operation of adding a metal conductor and a multi-walled carbon nanotube (MWCNT) to chloroform (CHCl.sub.3) to produce a first mixture, an operation of adding polydimethylsiloxane (PDMS) to the first mixture to produce a second mixture, an operation of evaporating the chloroform in the second mixture to acquire a third mixture, and an operation of adding an additional additive to the third mixture to produce a paste.

The invention is in the field of semiconductors. The invention is directed to a composition, a method for producing a layer, a layer, a photoconducting device and a photovoltaic device. The composition of the invention comprises a matrix comprising a polymer, and dispersed in said matrix one or more perovskite materials.

An ink composition for additive manufacture of silica aerogel objects essentially consists of a gellable silica sol containing an admixture of 30 to 70 vol.% of a mesoporous silica powder in a base solvent. The mesoporous silica powder has a particle size range of 0.001 to 1 mm and a tap density of 30 to 200 kg/m3 and comprises at least 10% by weight of silica aerogel powder. The composition has a yield stress in the range of 30 to 3000 Pa and a viscosity of 5 to 150 Pa.Math.s at a shear rate of 50 s−1. Furthermore, the composition has shear thinning properties defined as a reduction in viscosity by a factor between 10 and 103 for an increase in shear rate by a factor of 104 to 105. A method of additive manufacturing of a three-dimensional silica aerogel object by direct ink writing comprises providing such ink composition, forcing the same through a convergent nozzle, thereby forming a jet of the ink composition which is directed in such manner as to form a three-dimensional object by additive manufacturing. After initiating and carrying out gelation of the gellable silica sol constituting said object, a drying step yields the desired three-dimensional silica aerogel object.

An ink composition for additive manufacture of silica aerogel objects essentially consists of a gellable silica sol containing an admixture of 30 to 70 vol.% of a mesoporous silica powder in a base solvent. The mesoporous silica powder has a particle size range of 0.001 to 1 mm and a tap density of 30 to 200 kg/m3 and comprises at least 10% by weight of silica aerogel powder. The composition has a yield stress in the range of 30 to 3000 Pa and a viscosity of 5 to 150 Pa.Math.s at a shear rate of 50 s−1. Furthermore, the composition has shear thinning properties defined as a reduction in viscosity by a factor between 10 and 103 for an increase in shear rate by a factor of 104 to 105. A method of additive manufacturing of a three-dimensional silica aerogel object by direct ink writing comprises providing such ink composition, forcing the same through a convergent nozzle, thereby forming a jet of the ink composition which is directed in such manner as to form a three-dimensional object by additive manufacturing. After initiating and carrying out gelation of the gellable silica sol constituting said object, a drying step yields the desired three-dimensional silica aerogel object.

The present disclosure relates to semi-permanent tattoos, for example, genipin-based ink compositions. In some embodiments, the ink composition comprises: genipin present in an amount of about 10% to about 20% w/w of the composition; a solvent present in an amount of about 65% to about 80% w/w of the composition; and one or more of a thickening agent, humectant, and film-forming agent present in an amount of 0.01% to about 10% w/w of the composition. In some embodiments, the composition further includes a preservative.