Metal oxide powder formed of metal oxide particles, in which the metal oxide powder has first metal oxide particles having at least one protrusion portion and second metal oxide particles, the first metal oxide particles have an average primary particle diameter of 100 nm or more and 1,000 nm or less, the second metal oxide particles have an average primary particle diameter of less than 100 nm, and a fraction of a total mass of particles having a primary particle diameter of less than 100 nm in a total mass of the metal oxide powder is 0.3% by mass or more and 10% by mass or less.

Disclosed a method of preparing composite particles comprising a non-porous spherical particulate inorganic material deposited on a plate-like inorganic material, where refractive index of said particulate inorganic material is greater than that of said plate-like inorganic particulate material, wherein, said spherical material occupies 20 to 80% of total surface area of said plate-like material and wherein the amount of said spherical material accounts for 2 to 20 wt % of said composite particles, further wherein said plate-like inorganic material is mica and said non-porous spherical particulate inorganic material is silicone dioxide, said method comprising the steps of: (iv) silanization of said plate-like inorganic material to get a silanized material having functional groups “A”; (v) silanization of said non-porous spherical particulate inorganic material to get a silanized material having functional groups “B”, where A≠B; and where said “A” and said “B” are capable of reacting with each other such that by way of their reaction, said non-porous spherical particulate inorganic material deposits on said plate-like inorganic material; and, (vi) reacting said silanized material having functional groups “A” with said silanized material having functional groups “B”.

The subject of the present disclosure is a process for dyeing keratinous material, in particular human hair, comprising the following steps: Application of an agent (a) to the keratinous material, wherein the agent (a) comprises: (a1) at least one organic silicon compound selected from the group of silanes having one, two or three silicon atoms, and (a2) at least one coloring compound comprising at least one effect pigment comprising i) a substrate platelet, ii) a metal oxide (hydrate) layer provided on the surface of the substrate platelet, iii) a metal particle carrier layer provided on the surface of the metal oxide (hydrate) layer, and iv) metal particles provided on the surface of the metal particle carrier layer, and application of an agent (b) to the keratinous material, wherein the agent (b) comprises: (b1) at least one sealing reagent.

The present invention relates to a dry cosmetic and/or skin care composition, a process for preparing a dry cosmetic and/or skin care composition, the use of a dry composition as a cosmetic and/or skin care composition, and the use of a mixture comprising a first component and a second component as a replacement for talc or a talc-containing material in a dry cosmetic and/or skin care composition.

The present invention refers to the use of a surface-reacted calcium carbonate having a volume median particle size d.sub.50 from 0.1 to 90 μm as skin appearance modifier in a cosmetic and/or skin care composition.

The subject of the present disclosure is a process for dyeing keratinous material, in particular human hair, comprising the following steps: Application of an agent (a) to the keratinous material, wherein the agent (a) comprises: (a1) at least one organic silicon compound selected from the group of silanes having one, two or three silicon atoms, and (a2) at least one coloring compound comprising at least one effect pigment comprising i) a substrate platelet, ii) a metal oxide (hydrate) layer provided on the surface of the substrate platelet, iii) a metal particle carrier layer provided on the surface of the metal oxide (hydrate) layer, and iv) metal particles provided on the surface of the metal particle carrier layer, and application of an agent (b) to the keratinous material, wherein the agent (b) comprises: (b1) at least one sealing reagent.

A process for dyeing keratinous material, in particular human hair, is provided. The process includes applying an agent (a) to the keratinous material, the agent (a) including at least one organic silicon compound. An agent (b) is applied to the keratinous material. The agent (b) includes (b1) at least one coloring compound including at least one effect pigment including i) a substrate platelet, ii) a metal oxide (hydrate) layer provided on the surface of the substrate platelet, iii) a metal particle carrier layer provided on the surface of the metal oxide (hydrate) layer, and iv) metal particles provided on the surface of the metal particle carrier layer, and (b2) at least one film-forming polymer.

Disclosed are: a method for suppressing adhesion of air harmful substances, including applying a metal oxide (A) having an average primary particle diameter d.sub.A of 800 nm or less to skin in an amount of 0.03 mg/cm.sup.2 or more to suppress adhesion of air pollutants to the skin, and a method for suppressing adhesion of air pollutants, including applying an external preparation to skin to suppress adhesion of air pollutants to the skin, wherein the external preparation contains the component (AI), and the component (BI), the component (BII) or the component (BIII), and the ratio by mass of the content of the component (BI), the component (BII) or the component (BIII) to the content of the component (AI) in the external preparation each falls within a specific range. Component (AI): a hydrophobized metal oxide having an average primary particle diameter d.sub.AI of 800 nm or less. Component (BI): an ester oil. Component (BII): a nonvolatile hydrocarbon oil. Component (BIII): a nonvolatile silicone oil.

A zinc oxide powder in which a BET specific surface area (X) of the powder is 1.5 m.sup.2/g or more and 65 m.sup.2/g or less, a value obtained by a formula: an apparent specific volume (mL/g) measured by a loose packing method of the zinc oxide powder/an apparent specific volume (mL/g) measured by a tapping method of the zinc oxide powder is 1.5 or more and 2.5 or less, and Formula (1) and Formula (2) shown below are satisfied.

A1/E2=aX+0.06  (1)

(M2−M1)/E2≥0.02  (2)

The invention relates to a talc-free powdery solid cosmetic containing a powder component and an oil-based component that is [1] a powdery solid cosmetic which contains mica (A) having an average particle size of 15 μm or less and mica (B) having an average particle size of 10 μm or more as the powder component and in which the difference between the average particle size of the mica (A) and the average particle size of the mica (B) is 5 μm or more or [2] a powdery solid cosmetic containing 30 mass % or more of mica produced by a wet forming method.