A luster detector arranged such that an output light beam of an LED is applied to a surface through a light projecting lens as an irradiating light beam having a predetermined width. Rays of light reflected from the surface are applied through a condenser lens to a line sensor. Of the rays of light reflected from the surface, the rays of light reflected regularly form a light spot on a light detecting section extending in the longitudinal direction of the light detecting section. Hence, even if ...

The present invention relates to silver-colored luster pigments based on multiply coated platelet-shaped substrates, which has at least one layer sequence of TiO.sub.2, a colorless coating and another TiO.sub.2 layer. The pigment can optionally have an outer protective layer. These luster pigments are useful and to the use thereof in paints, coatings, printing inks, including security printing inks, plastics, ceramic materials, glasses, cosmetic formulations and for producing pigment preparation...

The invention relates to multilayered luster pigments based on metallic substrates, which are completely surrounded by a plurality of layers, where these layers comprise at least one layer pack (A) having a colorless dielectric layer of a material with a refractive index n of .ltoreq.1.8, and a colorless dielectric layer of a material with a refractive index n of >1.8, and a selectively or non-selectively absorbent layer (B), and to a process for their production, and to their use.

A concentrated aqueous pearlescent composition containing: (a) from 1 to 99.9% by weight of a ring-opening reaction product of an olefin epoxide containing from 12 to 22 carbon atoms and a reaction component selected from the group consisting of a fatty alcohol having from 12 to 22 carbon atoms, a polyol having from 2 to 15 carbon atoms and 2 to 10 hydroxyl groups, and mixtures thereof; (b) from 0.1 to 90% by weight of an emulsifier selected from the group consisting of an anionic surfactant, a ...

Mixtures useful as luster pigments for coloring paints, printing inks, plastics, decorative cosmetic preparations and ceramic products and usable in dry form in printing and coating processes consist of A) iron oxide-coated aluminum particles and B) iron oxide-coated mica particles with or without a prior coating of a colorless, highly refractive metal oxide as essential components.

A method and apparatus for determining the luster of a surface as a numerical value. The apparatus projects light from a light source through a light diffusing layer and through a layer of semitransparent material having thereon groups of parallel lines for projecting the lines onto the surface of a sample the luster of which is to be determined. The lines projected onto the surface are viewed with the eyes and the degree of distortion among the lines in the respective groups, which occurs due t...

A thick pearl luster dispersion comprising the following four components (A), (B), (C) and (D); (A) 15-40 wt % of a fatty acid glycol ester, (B) 0.3-12.5 wt % of an alkylsulfate or polyoxyalkylene alkylsulfate, (C) 3-25 wt % of a fatty acid dialkanolamide, (D) 45-85 wt % of water, the mixing ratios of the (B), (C) and (D) components lying within the area surrounded by straight lines obtained by connecting the determined four points on the triangular cordinate of the three-component system. A thi...

The invention relates to a pearl luster pigment which may possess a first, inner layer, consisting of a platelet-shaped substrate, a second layer, comprising one or more metal oxides, the first and second layers forming a calcined base pigment, a third layer, comprising the corresponding uncalcined oxide, hydroxide or oxide hydrate of the oxide of the second layer, a fourth layer, comprising oxides, hydroxides and/or oxide hydrates of silicon or aluminum, a fifth layer, comprising oxides, hydrox...

The application relates to a preferably golden color luster pigment based on lamellar substrates, in particular mica, which have been coated with metal oxides, the metal oxide layer containing both titanium and iron and the pigment containing mainly a pseudobrookite layer formed by simultaneous precipitation of the metal oxides. This golden color luster pigment is suitable for cosmetic articles because of its physiological acceptability and is particularly suitable for silicate melts because of ...

Luster pigments comprising coated, plateletlike, silicatic substrates wherein the coating comprises a layer consisting essentially of carbon and aluminum oxide, chromium oxide, cerium oxide, zirconium oxide, antimony oxide or mixtures thereof, are obtainable by applying carbon-containing compounds of the metals aluminum, chromium, cerium, zirconium, antimony or mixtures thereof with or without further carbon-containing compounds of the molecular formula (CH.sub.2 O).sub.n, where n is from 1 to 6...