A range of processes is described herein for the preparation of a range of ceramic glazes with traditional firing methods that represents significant efficiency and ecological advancements over existing methods and allows for the replacement of commercial ceramic colorant methods, while retaining the costly equipment and firing methods already used. The process allows for ceramic surface color while breaking standards for minimal amounts of transition metal colorant used. The nanoparticle-based glazes described here add new colors to the known ceramic surface palette and offers greater consumer safety as an alternative to existing coloring processes that use higher concentrations of toxic metal and an increased risk of metal leaching from the final ceramic vessel into its contents (e.g., soil, beverage, food).

A glass material for enamel is provided that can be used to produce an enamel product in which a luster pigment does not dissolve in glass and can thus maintain its luster properties to provide a metallic texture and high surface gloss. The glass material for enamel in accordance with the present invention contains a frit that has a composition thereof including 40 wt % to 60 wt % of silicon dioxide, 15 wt % to 35 wt % of boron oxide, and 18 wt % or less of one or more alkali metal oxides selected from the group consisting of lithium oxide, sodium oxide and potassium oxide, and a luster pigment for providing a metallic look.

A fine particle in which a surface of a copper oxide fine particle (a) is coated with a coating layer (b) containing a monovalent copper compound, in which the fine particle has a specific surface area of 100 m.sup.2/g or greater, an average primary particle diameter in a range of 5 to 20 nm, and an average secondary particle diameter in a range of 5 to 50 nm, is provided.

The invention relates to a transparent effect pigment which includes a non-metallic platelet-shaped substrate and a coating applied thereto, wherein the coating has a spacer layer. The invention further relates to a method for the production, as well as the use, of the transparent effect pigment.

A range of processes is described herein for the preparation of a range of gold nanoparticle (Au NP) ceramic glazes with traditional firing methods that represents significant efficiency and ecological advancements over existing methods and allows for the replacement of commercial ceramic colorant methods, while retaining the costly equipment and firing methods already used. The process allows for ceramic surface color while breaking standards for minimal amounts of transition metal colorant used. The nanoparticle-based glazes described here add new colors to the known ceramic surface palette and offers greater consumer safety as an alternative to existing coloring processes that use higher concentrations of toxic metal and an increased risk of metal leaching from the final ceramic vessel into its contents (e.g., soil, beverage, food).

The invention provides dispersed inorganic mixed metal oxide pigment compositions in a non-aqueous media utilizing a dispersant having polyisobutylene succinic anhydride structure to disperse a mixed metal oxide pigment in the media. The metal oxide pigment is of the type used to colour ceramic or glass articles. A milling process using beads is also described to reduce the mixed metal oxide particle size to the desired range. A method of using the mixed metal oxide dispersion to digitally print an image on a ceramic or glass article using the dispersion jetted through a nozzle and subsequently firing the coloured article is also described.

The invention provides dispersed inorganic mixed metal oxide pigment compositions in a hydrocarbon media utilizing a dispersant having polyisobutylene succinic anhydride structure reacted with a non-polymeric amino ether/alcohol to disperse a mixed metal oxide pigment in the media. The metal oxide pigment is of the type used to color ceramic or glass articles. A milling process using beads is also described to reduce the mixed metal oxide particle size to the desired range. A method of using the mixed metal oxide dispersion to digitally print an image on a ceramic or glass article using the dispersion jetted through a nozzle and subsequently firing the colored article is also described.

A method of manufacturing a housing of an electronic device includes determining a sintering profile configured to produce a selected color at a selected depth within a wall of the housing, sintering a ceramic housing precursor in accordance with the determined sintering profile, thereby forming the housing, and removing material from the housing up to the selected depth.

A solid composite material combining: an inorganic pigment in the form of discrete particles each comprising a colored core and a coating adapted to allow light to pass through and a matrix based on metalloid or metal oxide, said matrix being adapted to allow light to pass through.

Cement, concrete, stucco, and plaster that are have black ceramic polymer derived pigment included as an encapsulated water soluble sacket added to the powered or wet materials. A ceramic black SiOC additive encapsulated in a water soluble sacket and having a particle size of about 0.1 m to 3 m.