162results about How to "Reduce whiteness" patented technology

A composition for the rapid, temporary whitening of teeth comprising an adhesive material and whitening particulates.

An optical film (10), a polarizing plate, a liquid crystal panel, and an image display apparatus, wherein interference fringes can be made to be invisible, and cloudiness can be reduced. In accordance with one aspect of the present invention, there is provided an optical film including a light transmissive substrate (11); and a functional layer (12) disposed on the light transmissive substrate (11), wherein the functional layer (12) has a concavo-convex surface (12A) forming a surface of the optical film (10); assuming that a slope angle of the concavo-convex surface (12A) with respect to a film plane of the optical film in a cross section along a direction normal to the film plane is a surface angle, a rate of a region in which the surface angle is 0.05 DEG or more is 50% or more in the concavo-convex surface; and the root mean square slope R delta q of a roughness curve on the concavo-convex surface is 0.003 or less.

The invention discloses a preparation method of zirconium silicate wrapped ceramic pigment. In the method, after preparation of a raw material solution and preparation of a precursor suspension, the precursor suspension is dried so as to obtain the precursor powder, and consequentially, the wrapped ceramic pigment is obtained through roasting. In the method, by optimization of formula and control on pigment granularity, the whiteness of the ZrSiO4 wrapping layer is reduced effectively, and the color generation effect of the ceramic pigment is improved; by the obtained high-density wrapping layer, the effective wrapping efficiency and stability of the ceramic pigment are improved, and thus, the color source is protected effectively.

The invention provides a preparation method of white, low-fat and odorless silkworm pupa protein. The preparation method comprises the following steps of: with mechanically taken-off silkworm pupa as the raw material for production, preprocessing the silkworm pupa; filtering silkworm pupa skin; preparing rough silkworm pupa protein; adding ethanol to preprocess the silkworm pupa protein in a decolorizing and deoiling manner; adding a non-polar solvent and natural zeolite to process the silkworm pupa protein in the decolorizing and deoiling manner again; and then drying and crushing to obtain the finished silkworm pupa protein. According to the preparation method, the conventional method of extracting the raw material of silkworm pupa protein, extracting the silkworm pupa protein firstly and extracting the silkworm pupa oil secondly is changed, and the steps of heating and drying the raw silkworm pupa for extracting the silkworm pupa oil are avoided, so that the energy consumption is reduced, and the cost is reduced; a polar solvent and a non-polar solvent are adopted and used for extracting the silkworm pupa oil, respectively; the odor and the silkworm pupa oil in the silkworm pupa protein can be effectively removed by virtue of the physical absorption and deodorization effects of the natural zeolite, and the quality of the silkworm pupa oil also can be improved by distributive extracting.

A skin smoothing composition that has from about 0.5 to about 4% sodium silicate as measured by silica content (SiO2) and from about 0.1% to about 4.0% of a polyvalent silicate. The composition is provided in a carrier, for example, from about 10 to 98% water, and can be in the form of a water gel or oil-in-water emulsion. Further, the weight ratio of sodium silicate to the polyvalent silicate is equal to or greater than 0.7. and the polyvalent silicate is a silicate clay selected from the group consisting of bentonite, laponite, smectite, and kaolinite. Kits containing these compositions and methods of using these compositions are also provided.

A particulate metal oxide having the mean length of the primary particles in the range from 50 to 90 nm, the mean width of the primary particles in the range from 5 to 20 nm, and the median volume particle diameter of the secondary particles is less than 45 nm. The metal oxide can be used in a sunscreen product that exhibits both effective UV protection and improved transparency.

An antiglare hard coat film formed by providing an antiglare hard coat layer containing fine particles and a resin on a transparent film. When an average value of height in an evaluation region on a surface of the antiglare hard coat film is set at zero (0), a maximum cross sectional height represented by a difference between a height maximum value in the evaluation region and a height minimum value in the evaluation region is from 1.0 to 3.0 μm, and an average inclination angle of unevenness on the surface of the antiglare hard coat film is 1 degree or less. The total value of the transmissive clarity measured through four optical combs using a transmissive clarity measuring device according to JIS K 7105-1981 is 280% or more, and the value of the transmissive clarity measured through each optical comb is 70% or more, respectively.

The invention relates to a method for producing light calcium carbonate and coproducing hydrogen sulfide by using crude calcium sulfide, belonging to the technical field of chemical production. The method comprises the steps of: pulverizing the crude calcium sulfide, and dissolving out the pulverized crude calcium sulfide by using saturated hydrogen sulfide solution at room temperature to obtain sulfur calcium hydroxide solution; removing other impurities in the crude calcium sulfide by filtering and washing, and introducing CO2 into clear solution to generate precipitation of light calcium carbonate and continuously generate hydrogen sulfide gas; preparing the saturated hydrogen sulfide solution by using part of the generated hydrogen sulfide gas, and delivering the rest of the hydrogen sulfide gas to a gas holder for storage; filtering and washing feed liquid generated from carbonatation reaction to obtain light calcium carbonate solid; introducing the hydrogen sulfide gas into the filtrate to prepare the saturated hydrogen sulfide solution, and returning to the previous step to dissolving out the crude calcium sulfide for recycling; and drying, crashing and packaging the light calcium carbonate to obtain a finished product of light calcium carbonate. The light calcium carbonate product has less impurity and high whiteness compared with that produced by the traditional method, and the byproduct hydrogen sulfide can be used as raw material of other chemical products.

A horizontal grinding type rice milling machine, comprising a rice milling chamber having grinding rolls fixed around a horizontal rotating shaft and a cylindrical foreign matter removal screen (S) vertically dividable into two screen half parts and covering the grinding rolls concentrically thereto, wherein a plurality of stoppers and flaps formed of arc members curved along the periphery of the circular cross section of the cylindrical screen orthogonal to the axis there of are fixedly installed on the inner peripheral surface of each of the screen half parts obtained by dividing the foreign matter removal screen (S) into two parts so as to be alternately disposed in axial direction, a distance allowing rice to pass while restricting the passing amount of rice is assured between the flaps and the outer periphery of the grinding rolls, and a distance between the stoppers and the outer periphery of the grinding rolls is set so as to not to pass the rice, both screen half parts of the foreign matter removal screen (S) are formed in the same structure and, when the screen half parts are reversed to each other so that both ends thereof in axial direction are replaced with each other.