Pigments and inks for the decoration of ceramic objects, which have, in their formulation, iron and phosphorus oxides, combined with lithium oxide, the presence of this latter element being that which gives the pigments the capacity of being milled (in the form of a suspension in a solvent base) to the point of being able to obtain inks that are characterized by having very narrow PSD and an upper bound of less than 1 ?m. Thanks to this PSD, inks prepared using these pigments can be applied in standard printing heads to glazed ceramic objects, enabling a metallic gloss and appearance to be obtained after said ceramic objects undergo a firing process. The ink obtain has a low viscosity, allowing an increase in the concentration of the pigment and thus an increase in its yield, optimizing gloss and the metallic appearance of the finished ceramic objects.

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.

Latent colorant material compositions, soda-lime-silica glass compositions, and related methods of manufacturing color-strikable glass containers. The latent colorant material compositions may be introduced into a plurality of base glass compositions having redox numbers in the range of ?40 to +20 to produce color-strikable glass compositions and color-strikable glass containers. The latent colorant material compositions introduced into the base glass compositions include a mixture of cuprous oxide (Cu.sub.2O), stannous oxide (SnO), bismuth oxide (Bi.sub.2O.sub.3), and carbon (C). After formation, the color-strikable glass containers may be heat-treated to strike red or black therein.

A process for preparing whitened fly ash includes the steps of: (a) subjecting fly ash to a size classification step to obtain size classified fly ash having a particle size such that at least 90 wt % has a particle size of from 44 ?m to 250 ?m; (b) optionally, contacting the size classified fly ash from step (a) with water to form a slurry, wherein the slurry has a solid content of less than 40 wt %; (c) subjecting the slurry obtained in step (b) to an exhaustive magnetic separation step to form magnetically treated fly ash, wherein the exhaustive magnetic separation step includes a first magnetic extraction step and a second magnetic extraction step, wherein the second magnetic extraction step is carried out at a higher magnetic field strength than the first magnetic extraction step; and (d) subjecting the magnetically treated fly ash obtained in step (c) to milling to form whitened fly ash.

Frits or frit mixtures with pearlescent pigments for materials, such as ceramic glazes, which are stable above 1000 C.

A colored ceramic powder is produced from a mixture of coloring solutions consisting of metallic salts that are introduced to a ceramic slurry and subsequently dried. The coloring solution may comprise for example of chosen metallic salts, a solvent, an organic solvent such as derivatives of propylene oxides, an acid and a possible binder. Once all the constituents are thoroughly mixed to a homogeneous state, the slip is dried to a powder form, which spray drying equipment can be used. The dried powder can then be subjected to an isostatic or biaxial press manufacturing process to create a green state ceramic body. Once pressed, the ceramic body can be subjected to a sintering process. After final sinter, the resulting ceramic body possesses an innate color that is homogenous throughout its composition. The method is especially useful for coloring zirconia dental restorations.

Method for manufacturing a composite material combining a metal oxide or metalloid based matrix suited for allowing light to pass, and a mineral pigment dispersed in the matrix, the method comprising a step of mixing the mineral pigment in powder form with the matrix in powder form, and a step of sintering of the mixture under sufficient pressure such that the densification temperature of the matrix under said pressure is below the breakdown temperature of the mineral pigment, where the sintering temperature is greater than or equal to the densification temperature of the matrix and below the breakdown temperature of the mineral pigment.

A suction nozzle includes zirconia-based ceramics. The ceramics includes first grains and second grains. The first grains each contain zirconia, and the second grains each contain a black-colored component. The suction nozzle includes a suction face and a suction hole. The suction hole is in communication with the suction face. In the suction face, an area ratio of an area occupied by the second grains to a measurement face obtained by polishing the suction face is greater than or equal to 17% but less than or equal to 34%. A number of the second grains in an area of 90 m.sup.2 in the measurement face is greater than or equal to 150 but less than or equal to 250.

A dental material comprising a pigment, wherein the pigment contains Al, Cr and one or more of Y, La and lanthanides. The dental material allows mimicking the red coloration of natural teeth and natural oral mucosa. Also provided is the use of the dental material and the pigment and starting compositions for making the pigment in the preparation of a dental restoration. Furthermore, a process for preparing a dental restoration and a process for preparing the pigment is provided.

An oxide ceramic containing a pigment, wherein the pigment comprises Al, Cr, and one or more of Y, La, and lanthanides. Also provided is a dental shaped body containing the oxide ceramic with the pigment; a use of the oxide ceramic as a dental material; a use of the dental shaped body for preparing a dental restoration; a process for preparing a dental restoration; and a process for preparing the pigment.