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175 results about "Dark color" patented technology

A rapid detection and evaluation method for zeolite loading and zeolite loading uniformity in zeolite composite materials

The present application relates to the field of product quality inspection and evaluation of composite materials, and in particular, a method for rapid inspection and evaluation of zeolite loading and zeolite loading uniformity in zeolite composite materials, specifically as follows: in a multi-component system containing zeolite, by sequentially performing selective coloring operations and enhanced color development operations on zeolite microparticles, the originally colorless zeolite microparticles are transformed into zeolite particles with a specific dark color, and the color of the non-zeolite components is not changed during the above-mentioned treatment process, thereby transforming the microscopic zeolite loading determination technical problem into a macroscopic color depth analysis problem. The inspection and evaluation method of the present application has the advantages of being fast, low-cost, and capable of parallel operation. Based on the inspection and evaluation method provided by the present application, an analysis technology for continuous and non-omission load uniformity information of the inspection area can be developed.
Owner:HANGZHOU INNOVATIVE MATERIALS TECH CO LTD

Fabric color fastness friction detection device

The invention discloses a fabric color fastness friction detection device, and relates to the technical field of color fastness detection.The fabric color fastness friction detection device comprises a friction detection mechanism and lifting supports installed on the two sides of the friction detection mechanism, a fabric fixing mechanism is arranged at the bottom of the friction detection mechanism, and pressing supports are arranged on the two sides of the fabric fixing mechanism; the friction detection mechanism comprises a detection limiting disc, switching supports are symmetrically installed at the bottom of the detection limiting disc, fixing rings are fixedly installed on the inner sides of the switching supports, a fixing inserting groove is formed in the fixing ring on one side, a rotating ring is fixedly installed on the outer side of the fixing ring, and a clamping groove is formed in the outer side of the rotating ring. The friction cloth can be replaced by switching the connecting friction head and the mounting ring, so that flooding of the deep-color denim is eliminated, friction detection of the color fastness of the deep-color denim is carried out, the switched switching ring is fixed by utilizing the characteristic that the locking clamp is connected with the connecting bracket in a clamping manner, and the stability of the connecting friction head and the mounting ring is improved.
Owner:YONGJI KAITONG PRINTING & DYEING CO LTD

Image processing device, image processing method, and program

To suppress a gradation step in a region from the light color material to the dark color material in the case where the dark and light color materials are used in a mixed manner.SOLUTION: An image processing device generates a single color correction parameter for each of a normal color material and a light color material from a patch pattern formed using each of the normal color material and the light color material, and generates a mixed primary color correction parameter from a patch pattern formed using a mixed primary color obtained by mixing the normal color material and the light color material to which the single color correction parameter is applied. The image processing device specifies, as a modulation point, an input gradation value of the mixed primary color when an output of the normal color material is started in the mixed primary color based on a conversion table in which an input gradation value of the mixed primary color and an output gradation value of each of the normal color material and the light color material constituting the mixed primary color are associated with each other, and generates a correction chart in which the patch pattern corresponding to the modulation point is added to the patch pattern formed in stages.SELECTED DRAWING: Figure 4
Owner:RICOH CO LTD

Infrared-light-transmitting ink of dark color, and infrared-light-reflecting sheet obtained using same

PendingUS20250263565A1Phthalocyanine-azo dyesTransportation and packagingInfraredPhotopigment
In order to satisfy the demand of consumers regarding design attractiveness, an infrared-light-transmitting dark color ink is provided, the ink having a black appearance and attaining high design attractiveness and, despite this, having sufficient infrared-light-transmitting property. The infrared-light-transmitting dark color ink transmits near infrared light having wavelengths of 750-1,500 nm, and comprises a resin component and a pigment component that comprises both a brown pigment, e.g., a benzimidazolone pigment, and a phthalocyanine pigment.
Owner:DAI NIPPON PRINTING CO LTD

A processing method for improving the color depth of cigar wrapper

The present invention relates to the technical field of cigar processing, and discloses a treatment method for enhancing the color depth of cigar wrappers. The method employs an aqueous solution of amino acids and sugars for humidification, subjecting tobacco leaves to a high temperature environment of 35-45°C for infiltration of an externally applied Maillard reaction substrate and accumulation of the Maillard reaction substrate. The tobacco leaves are then fumigated in high-temperature steam at 55-70°C to promote rapid and extensive reaction of the Maillard reaction substrate on the leaves. Finally, a mild environment of 23-27°C is maintained to stabilize the converted substances, promoting the production of dark, uniform cigar leaves. The resulting dark, uniform cigar leaves exhibit good gloss and sufficient oil content.
Owner:HUBEI CHINA TOBACCO INDUSTRY CO LTD

Black pigment, ceramic ink prepared from black pigment and preparation method of ceramic ink

PendingCN121136516AInksDark colorColourant
The invention relates to the field of ceramic ink, and discloses a black pigment, ceramic ink prepared from the black pigment and a preparation method of the ceramic ink. The high-tinting-strength cobalt black pigment is prepared by adopting cobalt nitrate, nickel nitrate, chromic nitrate and ferric nitrate according to the molar ratio of 38: 6: 31: 25, co-precipitating, drying to obtain powder, and calcining at the temperature of 1100-1200 DEG C to obtain the high-tinting-strength cobalt black pigment. The ink prepared from the high-tinting-strength cobalt black pigment prepared by the preparation method disclosed by the invention is pure in hue and strong in tinting strength, is particularly suitable for producing dark-color ceramic tile layout products such as black golden flowers and the like, and can well solve the problem that the black color is not pure enough.
Owner:LONGNAN GUOSE MATERIALS TECHNOLOGY CO LTD

A method for optimizing edge searching precision of a table searching system

The present application relates to the technical field of thermal process, and especially relates to a method for optimizing edge searching precision of a surface inspection system, which divides a gray scale distribution into two regions of light and dark based on a gray scale reference value; sets a fixed edge threshold parameter or a variable edge threshold parameter for the surface inspection system; resets a periodic parameter; collects defect data in a way of training, modifying and adding; and optimizes a detection region. The present application has the following advantages: the gray scale range is expanded from 0-255 to 0-280, the reference value is increased from 128 to 140, and the light and dark regions are redivided, so that the defect pixel distribution is more balanced; for the working condition that the dark strip steel is close to the worn roller surface, the edge searching accuracy is improved, the positioning error is reduced, and the edge searching drift caused by the change of steel type and the wear of roller surface is solved; and the fixed and adaptive double-mode edge threshold strategy is adopted, the threshold value in the region within 30mm from the edge is narrowed by 20%-30%, and the fixed mode reduces the false positive rate.
Owner:ANGANG STEEL CO LTD

Manufacturing equipment and method for deep-color triamine veneer easy to clean

The invention discloses manufacturing equipment and method for a deep-color triamine veneer easy to clean. The manufacturing equipment comprises a base table, and guiding assemblies used for guiding and conveying the deep-color triamine veneer to be machined are installed on the two sides of the top of the base table correspondingly; a polishing assembly used for polishing the dark triamine veneer is installed at the position, located between the two guide assemblies, of the top of the base table. According to the polishing assembly, through structures such as adjusting bolts, the distance between polishing rollers can be flexibly adjusted, the polishing assembly is suitable for polishing veneers with different thicknesses, the polishing strength is adjusted, and the product quality stability is improved; a cleaning brush of the cleaning assembly can effectively clean the veneer, and the limiting telescopic assembly can adjust the distance in a self-adaptive mode, so that the cleaning effect is guaranteed, and a foundation is laid for subsequent procedures; the collecting assembly can strongly collect dust, improve the working environment and protect the health of personnel, the filter screen is convenient to disassemble, dust treatment and filter screen cleaning and replacement are facilitated, the service life is prolonged, the maintenance cost is reduced, and the production efficiency is improved.
Owner:CHANGZHOU WEIXING DECORATIVE MATERIALS +1

Compound and method for producing the same, solid electrolyte, and electric storage device

To provide a halogen-based compound capable of exhibiting high ionic conductivity and enabling visual checking of the mixing state of an additive when a dark-colored additive is incorporated.SOLUTION: There is provided a compound that satisfies formula (1) and has a mass fraction of an amorphous phase of 10% or more, wherein in formula (1), α and β are each independently a value greater than 0, γ is a value of 0 or more and less than 6, D represents an alkali metal element, M includes an element serving as a metal cation other than alkali metal elements, X represents a halogen element, and A represents an atomic group serving as a polyatomic anion containing two or more elements. Formula (1): DαMβX6-γAγ.SELECTED DRAWING: None
Owner:TOAGOSEI CO LTD +1

Middle frame structure, mobile device, screen assembling method and screen assembling platform

The invention relates to a middle frame structure, mobile equipment, a screen assembling method and a screen assembling platform. The middle frame structure comprises an interface arranged on the inner side of the middle frame structure, a dispensing transverse surface and an assembling vertical surface. The interface is connected between the dispensing transverse surface and the assembling vertical surface, and the interface is obliquely arranged. According to the arrangement, when lamplight irradiates the middle frame structure, the directions of reflected light rays of the adhesive dispensing transverse plane and the interface are different, so that the brightness degrees of the interface and the adhesive dispensing transverse plane are different, the boundary of the interface and the adhesive dispensing transverse plane is clear, the position of an assembly surface can be distinguished through the interface which shows darker, the edge grabbing precision of the CCD group screen equipment is improved, and the production efficiency is improved. And therefore, the screen assembly yield is improved, the problems of reworking, scrapping and the like are reduced, and the manufacturing cost is reduced.
Owner:BEIJING XIAOMI MOBILE SOFTWARE CO LTD

Sweeping and coating method for Sichuan painting

The invention discloses a Sichuan painting sweeping method, belongs to the technical field of silk painting processes, and aims to solve the problems that a traditional silk painting is hard in hand feeling and easy to fade after being washed due to the fact that alum treatment is needed, and a three-alum nine-dyeing technique is time-consuming, labor-consuming and high in threshold. The method comprises two steps of brush pretreatment and sweeping and coloring: during brush pretreatment, selecting an oil painting brush adaptive to the size and color requirements of a silk coloring area, cleaning and wiping the oil painting brush, dipping a dyeing material for blending, and performing differentiated wiping on the control material by using waste cloth; during sweeping and coloring, taking a pre-outlined pattern carried by non-alum crepe satin plain or crepe de chine as an object, starting from a deep color area, adjusting the brush arrangement angle to gently and repeatedly sweep and coat along the shading direction in a flat sweeping or oblique sweeping state, and repeatedly carrying out brush arrangement pretreatment after the dye is used up until the expected color level and picture effect are achieved. According to the method, the soft texture of the silk can be reserved, the picture lines are clear after sweeping and coating, washing resistance is achieved, operation is easy and convenient, and application of the Sichuan painting work in the fields of clothes, decoration and the like is expanded.
Owner:SICHUAN SHUNCHENG TEXTILE CO LTD

A method for monitoring a fruit bottom colored reflective film

The present application belongs to the technical field of intelligent agriculture, and discloses a monitoring method for a fruit bottom colorizing and light reflecting film, comprising the following steps: S1, forming a grid map for an orchard; S2, collecting fruit bottom images to obtain array type multi-angle image data; S3, performing edge processing on the image data to form fruit images; S4, performing fruit surface color analysis on the fruit images to form color feature data; S5, performing edge and dispersion analysis on dark color patches in the color analysis process to form lesion feature data; S6, inputting the color feature data and the lesion feature data of S4 and S5 into a preset fruit maturity and lesion grade library to obtain preliminary maturity and sunscald grades; S7, performing feature weighting judgment to output maturity grades and / or sunscald lesion probabilities; S8, if the lesion probability is greater than a preset threshold, automatically recording a collection time stamp, a lesion probability value, an image slice and a map location, and triggering an early warning of adjusting the light reflecting film to weaken the radiant light; if the lesion probability is less than or equal to the preset threshold, normally recording data.
Owner:QINGDAO AGRI UNIV

Reversible color-changing coating for temperature self-detection as well as preparation method and application of reversible color-changing coating

The invention relates to the technical field of reversible color-changing coatings, in particular to a reversible color-changing coating for temperature self-detection as well as a preparation method and application of the reversible color-changing coating. The reversible color-changing coating comprises the following raw materials: a reversible color-changing material, a room-temperature curing insulating coating, a heat-conducting filler and a dispersing agent, the reversible color-changing material comprises a long-chain alkyl alcohol solvent, a leuco agent and a gallic acid alkanol ester color developing agent. When the reversible color-changing coating is used, the reversible color-changing coating can be obtained only by coating the lap joint surface of the transformer bushing and curing at room temperature. The reversible color-changing coating disclosed by the invention is good in insulating property, excellent in heat-conducting property, convenient to use and remarkable in color change, and low-temperature light color and high-temperature dark color can be used for temperature self-detection of the lap joint surface of the transformer bushing of the transformer substation, so that inspection of inspection personnel is facilitated.
Owner:ZIYANG POWER SUPPLY COMPANY STATE GRID SICHUAN ELECTRIC POWER

LiDAR reflective materials and marking systems

The invention discloses a method for marking a dark surface with a dark LiDAR reflecting material, and a marking composition comprising the dark LiDAR reflecting material and a marking carrier. In particular, the dark LiDAR reflective material comprises a reflectivity in the visible spectrum of electromagnetic radiation of < = 10%, and a reflectivity in the near infrared and LiDAR spectrum of electromagnetic radiation of > = 10%.
Owner:TOYOTA MOTOR ENG & MFG NORTH AMERICA INC

Special vehicle honeycomb fixing

ActiveCN309621704SUncrewed vehicleDark color
1. The name of the design product: special vehicle honeycomb fixing. 2. The use of the design product: the overall product is used for heavy wheeled ground general unmanned mobile platform, and the partial appearance is used as the fixing of special vehicle honeycomb. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1. 5. The bottom surface of the design product is the part that is not easy to see or cannot be seen during use, and the top view is omitted. 6. Other circumstances that need to be explained: the dark part in the view is the part to be protected, and the light part in the view is not the part to be protected. The appearance design to be protected does not contain color.
Owner:CHONGQING TIEMA IND GRP

Space target three-dimensional reconstruction method for suppressing dark color interference through combination of brightness and transparency

PendingCN121999140Aquick estimateeffective estimateImage enhancementImage analysisPattern recognitionImaging quality
The invention belongs to the field of space target imaging, and discloses a space target three-dimensional reconstruction method for inhibiting dark color interference through combination of brightness and transparency, which is used for solving the problems of poor imaging quality and inaccurate pose estimation of a space target. According to the method, multiple requirements of improving the quality of an input image, adjusting a pose and training a three-dimensional model are jointly completed, and low-quality imaging of an incomplete imaging system is preprocessed based on lucky imaging; and then, dense feature points are extracted by using a pre-training network based on no detector, estimation of a three-dimensional initial point cloud and an initial pose of a camera is carried out, and pose joint adjustment is carried out by combining RANSAC and Bundle AdJustlement. During training, an MLP-based optimizer is used for calculating the deviation of pose adjustment, meanwhile, training of parameters of three-dimensional Gaussian primitives is carried out, and after various physical constraints are added, a one-stop assembly line can be implemented. According to the method, the good basic shape and the sharp edge of the model are kept, the good anti-noise capability is achieved, and meanwhile the real-time performance and the robustness are achieved.
Owner:GUANGDONG UNIV OF TECH

Method for rapidly screening breeding parents of turbinella angulata based on shell color phenotype

PendingCN122375532APuccinia xanthiiZooid
The application discloses a method for rapidly screening breeding parents of Babylonia areolata based on shell color phenotype, and the specific steps are as follows: collecting adult Babylonia areolata; dividing the adult Babylonia areolata into a dark color group and a light color group according to shell color, wherein the dark color group is red brown to dark red brown individuals, and the light color group is white to yellow brown individuals; using differential morphological indexes for the Babylonia areolata in different shell color groups to accurately screen Babylonia areolata breeding parents: for the dark color group, shell width is greater than or equal to 58 mm, body spiral layer width is greater than or equal to 45 mm, and shell mouth height is greater than or equal to 65 mm; and for the light color group, body spiral layer width is greater than or equal to 45 mm, shell mouth height is greater than or equal to 65 mm, shell height is greater than or equal to 91 mm, and shell width is greater than or equal to 55 mm. The parent with high body quality and high meat yield potential can be screened in vivo, and through comparison of offspring cultivation of the screening group and the control group, it is proved that the screening method can significantly improve the genetic gain (17.9-21.1%) of the target traits, and has good breeding application value.
Owner:LIAONING ACAD OF MARINE FISHERIES SCI (DALIAN INST OF BIOTECHNOLOGY LIAONING ACAD OF AGRI SCI LIAONING MARINE ENVIRONMENT MONITORING STATION)

Method and system for environmental monitoring based on images taken by a drone

This invention belongs to the field of computer vision and environmental monitoring technology, specifically relating to an environmental monitoring method and system based on images captured by unmanned aerial vehicles (UAVs). The method includes: acquiring images of a stockpile captured by the UAV and performing superpixel segmentation; extracting the color space statistical features, gray-level co-occurrence matrix features, and gradient features of each superpixel block; constructing a decoupling relationship for illumination saturation and using saturation differences to eliminate shadow interference; constructing a texture wetting smoothing relationship and using texture energy and gradient variance to eliminate interference from dark minerals; calculating an environmental compliance index based on the illumination saturation decoupling index and the texture wetting smoothing index, generating a heat map, and controlling the operation of dust suppression equipment accordingly. This invention, by decoupling physical optical features, effectively reduces misjudgments caused by backlighting, shadows, and the natural color of the ore, achieving accurate identification of the surface wetness of the stockpile, saving water resources, and improving dust suppression effectiveness.
Owner:CHINA CERTIFICATION & INSPECTION GRP SHANDONG CO LTD +1

System and method for enhancing visual contrast while preserving formatting when providing a dark viewing mode

A method of providing a dark viewing mode with enhanced visual contrast includes evaluating the luminance and chroma of background colors, including highlight colors, of digital content prior to converting the digital content for the dark viewing mode to identify highlight colors having a luminance value that exceeds a luminance value threshold and a chroma value that exceeds a chroma value threshold. When a highlight color has luminance and chroma values that exceed the respective threshold values, the luminance value of the highlight color is clamped to a predetermined lower luminance value before converting the value for the dark viewing mode. The luminance value is converted for dark viewing mode by taking the opposite luminance value. As a result, the luminance value of the converted highlight color has a higher luminance value and greater luminance contrast with respect to the dark background in dark viewing mode.
Owner:MICROSOFT TECHNOLOGY LICENSING LLC

UV laser-markable colored wire insulation material

Laser-markable dark-colored insulation materials that produce light-color marking with remarkably high contrast and durability, when marked with UV laser, are disclosed. Also disclosed are materials, synthesis, and application of the laser-markable insulation materials, and methods of making the insulation materials.
Owner:ALTAMIRA MATERIAL SOLUTIONS

Container, method for manufacturing container, and method for detecting overlapping portion of stacked sheet

To provide a container, a method for manufacturing a container, and a method for detecting an overlapping portion of a stacked sheet, which enable easy detection of an overlapping portion of a body portion.SOLUTION: A tube container 100 according to the present disclosure is a container in which a body portion 1a forming a storage space S for contents is formed of a stacked sheet 31 made of sheets of multiple materials, in which the stacked sheet 31 has a light-colored layer (first light-colored layer 11) that forms an innermost layer of the body portion 1a, and a dark-colored layer 13 that is provided radially outward of the light-colored layer and has a lower lightness than the light-colored layer, and the body portion 1a has an overlapping portion 32 formed by overlapping circumferential side end portions 31a, 31b of the stacked sheet 31 in a circumferential direction, and at least the dark-colored layer 13 protrudes circumferentially outward from the circumferential side end portion 31b of the stacked sheet 31 that is radially inner in the overlapping portion 32.SELECTED DRAWING: Figure 5
Owner:YOSHINO KOGYOSHO CO LTD

Colored curable resin composition

The present invention aims to provide a color curable resin composition capable of forming a color filter having a dark color and a thin film. The color curable resin composition comprises a colorant (A), a resin (B), a polymerizable compound (C), a polymerization initiator (D), and a solvent (E), wherein the polymerizable compound (C) comprises a first compound represented by formula (1) and a second compound represented by formula (2). [In formula (1), R 1a ~R 3a Any one of them represents a hydrogen atom, and the rest independently represent a (meth)acryloyl group. [In formula (2), R 1b ~R 3b Each independently represents a (meth)acryloyl group.]
Owner:SUMITOMO CHEM CO LTD

Massage head for a scalp treatment applicator

ActiveCN309985856SHead scalpRadiology
1. The name of the design product: the massage head of a scalp care applicator. 2. The use of the design product: the overall design is used for caring and applying to the scalp, and the partial design is used for massaging the scalp while providing the scalp with the liquid medicine in the container. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view. 5. Other circumstances that need to be explained: the design is a partial design, the part represented by dark color is the part that the design requires protection, the part represented by light color and selected by dotted line is not the part that the design requires protection, and the design does not require protection of color.
Owner:LG HOUSEHOLD & HEALTH CARE LTD

5D rock vamp and production process thereof

The invention belongs to the technical field of vamps, and particularly relates to a 5D rock vamp and a production process thereof.The 5D rock vamp comprises a vamp substrate, a mark layer is drawn on the upper surface of the vamp substrate, a texture layer is printed on the surface of the mark layer, the upper surface of the texture is coated with an attractive layer, the vamp substrate is made of polyester fibers, and the texture layer is made of water-based ink. According to the 5D rock vamp and the production process thereof, the 5D rock effect is formed by arranging the 5D rock vamp on the surface of the vamp substrate and printing multiple times through multiple screen plates, the surface of the rock texture layer is coated with the attractive layer, the surface of the texture layer is coated with the attractive layer prepared through pearlescent ink, the gradient color is formed, and the dark color is gradually transited to the light color; the layering sense of natural rocks is simulated, so that the attractive effect of the vamps is conveniently improved.
Owner:FUJIAN HONGXING ERKE SPORTING GOODS CO LTD

Tone mapping for out-of-HDR gamut adjustment

In order to easily correct typical out-of-gamut mapping problems when freely applying a desired luminance mapping function to a luminance / chrominance color representation, the inventors propose an apparatus (500) or method for transforming an input pixel color (CHb) of a high dynamic range input image into an output color (CSb) of an output image, the input color is represented as a gamma logarithmic defined triple comprising an initial first color component, an initial second color component and an initial third color component according to a photoelectric transfer function having a gamma logarithmic shape, the color transformation circuitry (501) is arranged to transform the initial first color component, the initial second color component and the initial third color component into an intermediate red component (R "im), an intermediate green component (G" im) and an intermediate blue component (B "im) by mapping the initial color component with the same function for each color component, the invention relates to a device for maximizing a function (551) for a sub-range of darkest color component values comprising an initial color component, the function having a slope greater than 1, characterized in that the device comprises:-a first maximization circuit (551) arranged to calculate a first value (Mx), the first value being a largest one of three intermediate color components for each input color; -a first subtractor (552) arranged to subtract a second value (V2) from the value, the second value (V2) being equal to a value obtained from applying the photoelectric transfer function to a tertiary value equal to a target display maximum brightness (MLTo) of the output image divided by a maximum brightness (MLPQ) associated with the photoelectric transfer function, the subtraction resulting in a fourth value (V4); -a second maximization circuit (553) arranged to calculate a fifth value, which is the highest one of the fourth value and zero; -a second subtractor (554), a third subtractor (555) and a fourth subtractor (556) arranged to calculate three output color components (R ''out, G'' out, B ''out) by subtracting a fifth value from the corresponding intermediate color components, and arranged to set the output color components equal to zero if the subtracting produces a negative value.
Owner:KONINKLIJKE PHILIPS NV

Preparation method of low-color-value polyethylene furandicarboxylate

The invention provides a preparation method of low-color-value polyethylene furandicarboxylate. The germanium-titanium composite catalyst is used as the catalyst for preparing the polyethylene furandicarboxylate, so that the problems of slow reaction and dark color of the polyethylene furandicarboxylate are solved. According to the preparation method of the polyethylene furandicarboxylate, all the raw materials are only added before the reaction, additives or other catalysts do not need to be added in the middle process, the process is very simple, the process is environment-friendly, and industrialization is facilitated.
Owner:FUZHOU UNIV +1

Puzzle

A puzzle having a multitude of pieces that are operably coupled in adjoining rows and columns wherein each piece of the puzzle includes indicia imprinted thereof providing indication as to the location of the piece for assembly of the puzzle. The puzzle includes a first edge border, second edge border, first column edge and second column edge that are a unique color. Furthermore, the first edge border and second edge border include numbers imprinted thereon in a sequentially increasing order. The first column edge and second column edge have alphabet characters imprinted thereon providing indication of location of the pieces during assembly of the puzzle. The pieces intermediate the first edge border, second edge border, first column edge and second column edge include a first indicia and a second indicia providing indication of the location the pieces. The puzzle in a preferred embodiment has darker colors proximate the center.
Owner:SIMPSON JEROME DOUGLAS SNOWDON