42 results about "Dark colour" patented technology

The invention relates to a divisional light and dark colour change control method for liquid crystal sunglasses and a control device thereof. Liquid crystal lens are divided into a plurality of longitudinal distribution parallel liquid crystal bars, the luminousness is controlled by the control voltage applied to every liquid crystal bar by controllers; the sensing signal of the external average illuminance is input to the controllers, the average light transmission rate of the whole liquid crystal lens is controlled by an average control voltage output by controllers; the incident angle of an intense light source to the liquid crystal lens is measured by an angular transducer, the liquid crystal bar at the intersection point between the link of the intense light source and human eyes and the liquid crystal lens is selected according to the incident angle; the control voltage of the glare-shielding bar is increased to make the bar a black area. The total light transmission rate and the distribution of the light and dark colour change areas of the liquid crystal lens can automatically vary with the environmental illuminance and the angle of the strong incident light, the light-to-dark transition region is arranged on the liquid crystal lens and the lens has the advantages of simple structure, small volume and low cost.

The present invention belongs to the field of pearl processing technology, and relates to an optimized processing method for pearl colour, luster and brightness. It is characterized by that according to the original physico-chemical properties and crystal structure of pearl said invention utilizes the comprehensive mechanism of adsorption bleaching, oxidation bleaching and fluorescent bleaching, and adopts a solid-liquid phase alternative action so as to implement optimum processing of pearl colour, luster and brightness. The results show that the bleaching rate for pearl with light assorted colour is up to above 80%, and the bleaching rate of for pearl with dark colour is up to above 70%, and the pearl luster can be greatly raised and brightness also can be improved.

The invention provides a bearing device for cell vitrification. The bearing device comprises a droplet bearer; the droplet bearer is of a rectangular shallow tray structure, and comprises a cell bearing region in which a frozen carrier is put at the middle, and a hydrophobic region surrounding the cell bearing region; the hydrophobic region is of an annular structure laid with a super-hydrophobicmaterial; the middle parts of two sides of the droplet bearer are provided with dark-colour marked lines respectively; and the two dark-colour marked line are located on the central axis of the droplet bearer. The bearing device enables living cells to rapidly and effectively realize vitrification.

A method for making a polyurethane coated fabric, the method comprising:— a) providing a fabric liner; b) applying a coating to at least part of the liner, said coating comprising a polyurethane resin and manganese ferrite dissolved in a polar aprotic solvent; c) at least partially gelling the coating with water or an aqueous solution, so that the polar aprotic solvent is extracted from the coating; d) leaching the at least partially gelled coating with water or an aqueous solution, so as to further reduce the level of the polar aprotic solvent in the coating; and e) drying and curing the coating. The coating may also contain a dark colour pigment. A composition suitable for use in the method is also provided. The method enables polyurethane coated fabric products, such as gloves, to be produced which are black or grey in colour and contain a reduced amount of residual polar aprotic solvent, such as N,N-dimethylformamide.

The invention relates to a gradient divisional colour change control method for liquid crystal sunglasses and a control device thereof. Liquid crystal lens are divided into a plurality of parallel liquid crystal bars, the transmittance of every liquid crystal bar is controlled; an average control voltage is output by controllers according to the external average illuminance to control the average light transmission rate of the liquid crystal lens; the incident angle of an intense light source to the liquid crystal lens is measured by an angular transducer, a centre glare-shielding bar is selected according to the incident angle; the control voltage of the centre glare-shielding bar is increased to make the bar a black area, the bars next to the centre glare-shielding bar are used as transition glare-shielding bars, and the control voltage is applied to the transition glare-shielding bars in gradually decreasing current so that the light transmission rate of the transition glare-shielding bars is gradually increased from the black area to a light area to form a gradient light-to-dark transition region between the black area and the light area. The total light transmission rate and the distribution of the light and dark colour change areas of the liquid crystal lens can automatically vary with the environmental illuminance and the angle of the strong incident light, the light-to-dark transition region is arranged on the liquid crystal lens and the lens has the advantages of simple structure, small volume and low cost.

The present invention relates to a composition comprising vegetable oil, caramel and one or more phenolic compounds. The caramel and one or more phenolic compounds together prevent oxidation of the vegetable oil, such that the amount of EDTA in the composition can be reduced. The caramel has been heated such that it does not impart a dark colour to the composition. The invention also relates to a method to prepare the composition. Finally the invention relates to use of caramel and one or more phenolic compounds to decrease the oxidation of vegetable oil.

The invention relates to the field of puzzles and can be used as a game for the development of logical thinking by people of all ages. The technical result of the present invention is a puzzle that is difficult to solve, with the possibility of varying the degree of difficulty, and has increased aesthetic appeal in the case of different solutions due to the ability of adjacent back-lit elements to change colour at random, thereby resulting in a large number of colour combinations in the game and rendering the puzzle more difficult to solve due to the absence of a solution algorithm. This technical result is achieved as follows. The exterior of the "Colour Ball" puzzle has the appearance of a classic football ball, and the interior contains an electrical power element, closable electrical contacts, light-emitting elements for the internal coloured backlighting of external semi-transparent surface elements, and an electronic circuit for controlling said backlighting, the puzzle being in the form of a sphere that is made up of twelve pentagonal elements and twenty hexagonal elements, wherein when pressure is applied to any pentagonal element, said element being made of a dark, non-transparent, flexible material and having closable electrical contacts disposed thereunder, the colour of the internal backlighting of all of the hexagonal elements directly adjacent thereto simultaneously cyclically changes, said hexagonal elements being made of a white, semi-transparent material.

The invention relates to mixing black maintaining ink, an ink layer structure and a laser code carving method. The mixing black maintaining ink includes ink components of three-primary colors C, M andY, namely, cyan ink, magenta ink and yellow ink, and according to the mass part ratio, the cyan ink ranges from 30 parts to 60 parts, the magenta ink ranges from 20 parts to 50 parts, and the yellowink ranges from 10 parts to 40 parts. The ink which is obtained through mixing of the three-primary colors C, M and Y and is macroscopically black is adopted for replacing pure black ink, the dark inklayer of images-texts is obtained through mixing, and therefore the laser carving removal complexity difference of different ink layers is formed conveniently; and the problems that shallow ink layers are subjected to laser carving removal and dark ink layers are shown are solved, and the code carving effect with multiple colors mathaced is achieved through the principle.

The present invention relates to a security element (20) for a secure document, comprising: - a substrate (22), - a metallic layer (24) borne by the substrate, defining in at least one first area (25) a first pattern (M1) visible in transmitted light, in particular a first pattern formed by metallization and/or demetallization of the substrate, - a non-opaque interference layer, preferably goniochromatic, in particular a layer of liquid crystals (27), borne by the substrate, presents at least one second area distinct from the first, - an absorbent auxiliary layer (30), preferably of a dark colour, able to show in reflected light at least one second pattern (M2) with the non-opaque interference layer by acting on the absorbent character of the base lying behind the non-opaque interference layer, said second pattern (M2) being defined by a contrast between the association of the auxiliary layer and the non-opaque interference layer, and a metallized area of the metal layer or between the association of the auxiliary layer and the non-opaque interference layer and the surroundings thereof at a demetallized area of the metal layer, the auxiliary layer being located substantially outside of the first area.

The invention firstly provides a phase optical variable anti-counterfeiting element which at least comprises a magnetic optical variable pigment layer and a dark background layer; the connecting material of the printing ink of the magnetic optical variable pigment layer is ultraviolet light cured resin, the magnetic optical variable pigment can be arranged in a plurality of phase angles under the interaction of a plurality of magnetic positioning devices and one or more shading plates, a light and shade alternate effect is formed under the action of light, and after the angle is changed, the original bright part becomes dark, and the dim part has a bright phase change effect. The dark background layer can also be combined with infrared, magnetic, fluorescent, hidden information and other two-line machine-readable anti-counterfeiting features to form a phase optical variable anti-counterfeiting element which can meet the requirements of the public for easy recognition and can also be compounded with difficult-to-counterfeit multi-stage anti-counterfeiting elements.

An immunohistochemical microchromatometer has a transparent sheet as base body, on which there is a transparent chromatic band from light colour (tan) to dark colour (tawny), which are graduted. Said microchromatometer can be put in eye lens of microscopic to provide a colour reference to judge the immunohistochemical stain result. It can be made up by photography, copy and colour print.