Device for metering color pigments as an additive for cement or alternative cement for the production of colored concrete products, comprising at least three containers for receiving respectively different color pigments, a control unit for setting the discharge quantities from the containers, and a sensor system coupled to the control unit in order to meter a color pigment composition taking into account the discharge quantities detected by the sensor system, wherein at least one brightness value L* value for the inherent color of the cement or alternative cement of the concrete product to be colored in each case is stored or storable in the control unit, and the control unit is configured to apply a color triangle as a function of the at least one L* value for controlling the output of predetermined quantities of the color pigments from the at least three containers based on a set of three standard color values X, Y, Z.

Ceramics are capable of reducing color irregularities and uneven coating, hard to dissolve into glaze, and excellent in fixation. A water-based paint contains a coloring material, first cellulose nanofibers having a lignin content of 20 to 40 mass % and a water retention of 150 to 300%, and second cellulose nanofibers having a higher viscosity compared to the first cellulose nanofibers, and the water-based paint has a B-type viscosity of 600 cps or higher. Ceramic ware or glassware or the like having painting made on a green body of which surface is formed of silicic acid or silicate compound as a main component, with the water-based paint.

The disclosure relates to an artificial agglomerated stone article comprising a granulated vitreous material, having high whiteness and opacity, with a specific oxide composition and to a method for the manufacture thereof.

The present invention relates to a dental porcelain paste comprising glass powder (A), an organic solvent (B), and a coloring agent (C) that is decolorable by baking, and satisfying at least one condition selected from a condition (1): a color difference E* calculated from a color tone obtained by colorimetrically measuring in the L*a*b* color space the dental porcelain paste having a thickness of 0.5 mm before baking and a color tone obtained by colorimetrically measuring in the L*a*b* color space a baked product having a thickness of 0.5 mm obtained by baking the dental porcelain paste in vacuum at 740 C. is 8.5 or more, and a condition (2): a brightness difference L* calculated from a brightness obtained by colorimetrically measuring in the L*a*b* color space the dental porcelain paste having a thickness of 0.5 mm before baking and a brightness obtained by colorimetrically measuring in the L*a*b* color space a baked product having a thickness of 0.5 mm obtained by baking the dental porcelain paste in vacuum at 740 C. is 6.5 or more; a dental porcelain kit; and a method for producing a dental prosthesis.

The present invention relates to a dental zirconia mill blank comprising a porous zirconia material, the porous zirconia material comprising Zr oxide, Y oxide, optionally Al oxide, Bi oxide, Tb oxide, Er oxide, Cr oxide, the porous zirconia material not comprising Fe oxide calculated as Fe.sub.2O.sub.3 of more than 0.01 wt. %, Mn oxide calculated as MnO.sub.2 of more than 0.005 wt. %, Co oxide calculated as Co.sub.2O.sub.3 of more than 0.005 wt. %, wt. % with respect to the weight of the porous zirconia material. The invention also relates to a process of producing such a dental zirconia mill blank and a dental restoration which can be machined from the dental zirconia mill blank. Further, the invention relates to a kit of parts comprising such a dental zirconia mill blank and a dental cement.