Abstract: A method for forming an object includes moving a recoat assembly over a build material, where the recoat assembly includes a first roller and a second roller that is spaced apart from the first roller, moving the second roller above the first roller in a vertical direction, rotating the first roller of the recoat assembly in a counter-rotation direction, such that a bottom of the first roller moves in a coating direction, contacting the build material with the first roller of the recoat assembly, thereby fluidizing at least a portion of the build material, while the second roller is spaced apart from the build material in the vertical direction, and moving the fluidized build material with the first roller, thereby depositing a second layer of the build material over an initial layer of build material positioned in a build area.

Abstract: 3D (three-dimensional) ink-jet printing includes techniques for evaporating a carrier liquid during printing while at least a portion of dispersant remains in the printed layer; evaporating dispersant in a first layer prior to sintering the first layer and/or prior to printing a second layer; leveling an upper-layer of a printed object using a horizontal roller; and printing layers of an object, each layer with both object and support portions, resulting in an object with support, in particular, support for negative angles and molds.

Abstract: An integrated device of bi-directional ultrasonic rolling, powder spreading, and compaction for additive manufacturing is provided, including an integrated device of ultrasonic rolling and powder spreading, and a platform lifting device. The integrated device of ultrasonic rolling and powder spreading is located above the platform lifting device. It can achieve ultrasonic rolling composite additive manufacturing, synchronously carry out ultrasonic rolling strengthening during selective laser melting process, improve the performance of manufacturing components, and the integrated device of ultrasonic rolling and powder spreading can achieve bi-directional strengthening, powder spreading and compaction.

Abstract: A method for additive manufacturing and an additive manufacturing apparatus are provided. The method includes disposing a nozzle of a print head of an additive manufacturing system over a location on a substrate. An ink composition from the nozzle is deposited onto the location of the substrate while moving the nozzle away from the substrate to increase a distance therebetween, thereby forming a portion of a structure on the location. The method includes repeatedly, as necessary to increase a distance the portion of the substrate protrudes from the substrate, performing the following over the location: moving the nozzle away from the substrate while not depositing the ink composition, moving the nozzle towards the substrate, and dispensing the ink composition from the nozzle onto the structure while moving the nozzle away from the substrate.

Abstract: A cleaning system for an additively manufactured component includes a tank storing a cleaning fluid. A fluid circuit is operably coupled with the tank. A pump is coupled with the fluid circuit. A manifold is configured to receive fluid from the fluid circuit through the pump. At least one of a coupler defined by the manifold or a hose is coupled with the manifold. The at least one of the coupler defined by the manifold or the hose is further configured to couple with said additively manufactured component.

Abstract: A computer implemented method for generating machine control data for a 3D printer to produce a three-dimensional object with a three-dimensional surface structure on at least one surface of the three-dimensional object, comprises the steps of: a) Providing a three-dimensional data model of the three-dimensional object to be produced; b) Defining an area to be structured on a surface of the data model of the three-dimensional object; c) Conversion of the data model of the three-dimensional object provided in step a) to specific machine control data for the 3D printer defining a print path of the 3D printer and optionally printing parameters of the 3D printer required for producing the three-dimensional object; d) Identifying positions on the print path lying on the area to be structured; e) Defining an offset amplitude of the three-dimensional surface structure, whereby the offset amplitude represents a height and/or depth of the surface structure with respect to the surface of the three-dimensional object

Abstract: An object forming data generation program including instructions to cause a controller of a computer to perform operations. The operations include obtaining three-dimensional data representing a three-dimensional shape of a three-dimensional product; setting a plurality of supports to be connected to the three-dimensional product and a support member to be connected to each of the plurality of supports, based on the three-dimensional data, such that, when viewed from a reference direction intersecting each of the plurality of supports, the support member is offset to a position outside the three-dimensional product and at which a length of each of the plurality of supports in a longitudinal direction thereof is a predetermined amount from an outer periphery of the three-dimensional product; and generating three-dimensional object forming data for forming an object including the three-dimensional product, the plurality of supports, and the support member, using a three-dimensional object forming apparatus.

Abstract: Methods of printing parts, e.g., using a 3D printer, are disclosed. The methods include receiving a representation of a part to be printed. The methods include analyzing the representation along one or more of an X-Y plane, X-Z plane, and Y-Z plane to identify locations of the part where the one or more supports are needed. The methods include depositing a first layer of the one or more supports at a first spacing. The methods further include depositing a second layer of the one or more supports at the first spacing. The methods additionally include repeating the deposition of additional layers of the one or more supports. The methods include printing the part onto the one or more supports.

Abstract: Disclosed is a method for producing a joined body obtained by joining a base material A, a solid joining agent containing an amorphous thermoplastic resin, which is at least one of a thermoplastic epoxy resin and a phenoxy resin, as a main component, and a base material B in this order, in which at least the base material A is a thermoplastic resin base material, an epoxy equivalent of the amorphous thermoplastic resin is 1,600 g/eq. or more or the amorphous thermoplastic resin does not contain an epoxy group, and a heat of fusion of the amorphous thermoplastic resin is 15 J/g or less, and the method has a step of superposing and a joining step (1), or has a joining step (2-1) and a joining step (2-2).

Abstract: A joint for use with a composite laminated component is disclosed herein. The joint includes a component including a partial U-shaped trapezoidal cavity and a triangular component. The partial trapezoidal component includes a base extending in a first direction, a first side extending away from the base at a first angle from the first direction, a second side extending away from the base at a second angle from the first direction and toward the first side, and an opening defined by the first side and the second side. The triangular component is coupled to the base and extending orthogonally away from the base in a second direction and toward the opening.

Abstract: A system for bonding films includes a first film, a second film having a plurality of elements, a bonding roller, and a deformable roller having a deformable outer layer. The stiffness of the second film is less than that of the first film. By using the system, the deformable outer layer of the deformable roller produces enough deformation during bonding films to fill the area not covered by the plurality of elements on the second film. Therefore, the second film without sufficient stiffness and the first film can be bonded with each other to produce a composite film without wrinkles. A method for preparing a composite film using the system is also disclosed.

Abstract: A mandrel for the manufacture of a tube is provided. The mandrel includes one or more discs spaced apart from each other; one or more guide wires coupled to one or more of the discs; and one or more control wires coupled to one or more of the discs. Articulation of one or more of the control wires induces a shape change in the tube. Methods for manufacturing a tube are also provided.

Abstract: Methods of making composite drive shafts and manufacturing assemblies thereof are provided. The methods include providing a removable mandrel having a cylindrical shape and assembling a lobe joint member at an end thereof. The lobe joint member includes at least three lobes equally distributed thereabout. A removable end flange is assembled to the lobe joint member at an opposite end of the lobe joint member from the removable mandrel to form a manufacturing assembly. A composite material is applied to an exterior surface of the manufacturing assembly to form a composite tubular that includes the lobe joint member at an end thereof. The removable end flange is removed from the lobe joint member and the removable mandrel is removed from within the composite tubular to form a composite drive shaft comprising the composite tubular and the lobe joint member integrally formed at an end of the composite tubular.

Abstract: A process for the manufacture of hollow manufactured articles made of composite material comprises: at least one phase of supply of a composite material for the manufacture of a manufactured article provided with one or more cavities; at least one phase of supply of at least one die body; at least one phase of supply of at least one mould provided with at least two valve bodies pressable under pressure against each other in order to define, interposed between the same bodies, at least one groove; at least one phase of arranging said die body inside said groove; at least one phase of interposing said composite material between said die body and said mould, inside said groove; and at least one phase of curing the composite material contained in said groove.

Abstract: A method for manufacturing a composite part, in particular an aeronautical composite part, in which the method includes the steps of heating a mixture of a polymerisable resin and a curing agent to a temperature and/or for a period of time sufficient to ensure that the curing agent is completely dissolved; cooling the mixture to a safety temperature so as to prevent at least one exothermic reaction; subsequently or immediately injecting the mixture into a mould including a fibrous preform at an injection temperature equal to or higher than the dissolution temperature.

Abstract: A gusseted package manufactured from recycle ready flexible packaging film including an obround aperture for sealing the front panel and rear panel together to accommodate the stretch characteristics of recycle ready flexible packaging film such that gusseted packages can be manufactured at the same speed and consistency as with non-recycle ready flexible packaging film.

Abstract: Various systems, devices, and methods for insulated containers with a drawer are provided. In general, an insulated container, such as a portable cooler, includes a drawer. The insulated container includes a main chamber and includes a drawer chamber that is separate from the main chamber and is configured to movably receive the drawer therein. The main chamber is configured to hold a cooling agent that is configured to cool any items in the main chamber and also any items in the drawer. The insulated container can be manufactured using injection molding.

Abstract: A tank container insulation foaming structure comprising a press molding module and a clamping fixation module for securing the press molding module; the press molding module comprises a flat plate that connects with the tank container, an arc plate provided on the flat plate, and a connection plate for connecting the flat plate with the arc plate; a foaming space is formed between the arc plate and the tank container; the clamping fixation module comprises a fixed frame for securing the flat plate, a compression rod for fastening the fixed frame, and connecting components that connect the compression rod with the tank container; the fixed frame is connected to the press molding module and fastens the fixing frame to the tank container by the compression rod, the compression rod is connected to the tank container through connecting components; the foaming space has an insulating layer formed by the foaming material.

Abstract: An inflatable structure (300) made from a composite material, wherein the inflatable structure is manufactured from at least two formed material sheets (315) that are cut out of the composite material according to a predefined cut-out structure (320), and wherein the formed material sheets are glued together at respective joins (330) of the formed material sheets via a respective double-sided adhesive tape (340).

Abstract: A method of forming an article of footwear can include flowing a material into an inlet port of a last and through a plurality of interconnected channels extending through an interior of the last that are fluidly connected to the inlet port. The method can further include flowing the material from each channel, out a respective outlet port of the channel that is disposed on an outer surface of the last, and directly onto the outer surface of the last. The method can further include solidifying the material on the outer surface of the last to form at least a portion of the article of footwear.

Abstract: A cupsole for footwear, said cupsole comprising at least a sidewall, a bottom surface and a central portion and wherein said sidewall circumscribes the central portion, said central portion having openings, preferably in the form of at least one honeycomb structure and wherein at least the sidewall and the bottom surface of the cupsole have a solid structure with no openings and wherein the complete cupsole is customized on the base of specific and measured data obtained directly from the user and printed in 1 single 3D printing step thereby using a thermoplastic polymer.

Abstract: Embossing unit comprising a fixed structure (1) and a mobile structure (2) configured to be moved to and from the fixed structure (1), a first embossing assembly (LA), a second embossing assembly (UA) and a gluing assembly (GA), wherein the first embossing assembly (LA) comprises a first engraved steel roller (3) and a respective rubber counter-roller (4), wherein the second embossing assembly (UA) comprises a second steel engraved roller (5) and a respective rubber counter-roller (6), and wherein the gluing assembly (GA) is mounted on the mobile structure (2). The first embossing assembly (LA) and the engraved roller (5) of the second embossing assembly (UA) are mounted on the fixed structure (1) while the rubber counter-roller (6) of the second embossing assembly (UA) is mounted on the mobile structure above the gluing unit (GA).

Abstract: A composite sandwich panel assembly with a defined set of breakpoints includes two or more open area cores, a high gloss surface sheet, and a structural skin. Each of the open area cores define a plurality of pores and each has a first face and an opposing second face. The high gloss surface sheet is adhered to the first face of the open area cores by a first adhesive layer. The high gloss surface sheet has a high gloss surface. The structural skin is adhered to the second face of each of the open area cores by a second adhesive layer. The interface between each of the open area cores determines the breakpoint of the composite sandwich panel.

Abstract: The present invention is a multi-wall sheet made of a plastic with a high shear modulus intended to provide physical protection, structural support, and thermal insulation in applications where a small bending radius for the multi-wall plastic sheet is desired. The multi-wall configuration includes a generally flat outer single sheet and a contoured inner single sheet separated by a series of ribs of similar plastic material to form a connected row of longitudinal cavities or “channels”. The inner wall is contoured in a concave manner to form a relief between each rib. When the multi-wall sheet is flexed, each relief distorts to minimize stress in the transverse direction while maintaining high rigidity in the longitudinal direction. In another embodiment of the present invention, multiple single sheets separated by ribs and contoured similarly to that of the inner wall are added between the contoured inner wall and non-contoured outer wall.

Abstract: Substrates comprising a functionalizable layer, a polymer layer comprising a plurality of micro-scale or nano-scale patterns, or combinations thereof, and a backing layer and the preparation thereof by using room temperature UV nano-embossing processes are disclosed. The substrates can be prepared by a roll-to-roll continuous process. The substrates can be used as flow cells, nanofluidic or microfluidic devices for biological molecules analysis.

Abstract: Provided is a honeycomb core material. The honeycomb core material is formed by welding a plurality of honeycomb corrugated bands, and includes a plurality of honeycomb elements. The honeycomb corrugated band includes free edges (1) and node edges (2) that are continuously arranged. The node edges that are correspondingly welded together form a honeycomb element node, and honeycomb element nodes are welded by laser or resistance spot welding. Welding spots of spot welding are uniformly distributed, a distance between two adjacent welding spots in a direction perpendicular to a cross section of the honeycomb element is d, a side length at the honeycomb element node is A, and a value of d is less than or equal to a value of A.

Abstract: [Problem] A problem to be addressed by the present invention is to provide a CFRP with a low risk of edge glow by virtue of controlling the structure of the CFRP and without relying on expensive electroconductive particles. In other words, provided is a CFRP such that the risk of edge glow is greatly decreased, even in a case where electroconductive particles are used in an amount equal to or smaller than in a conventional technology. Further provided is a CFRP such that the risk of edge glow is greatly decreased without using electroconductive particles.

Abstract: The invention relates to a multilayer sound absorber comprising a flow-resistant nonwoven with at least two individual flow-resistant layers, wherein the individual flow-resistant layers are arranged one above the other in a direction of penetration of the sound waves to be absorbed and each has a flow resistance between 300 Pa s/m and 1800 Pa s/m, preferably between 400 Pa s/m and 1500 Pa s/m, wherein the flow resistance of the respective individual flow-resistant layer increases from individual flow-resistant layer to individual flow-resistant layer in the direction of penetration. The invention also relates to a method for manufacturing the multilayer sound absorber according to the invention and to a use of the multilayer sound absorber according to the invention for sound absorption in the automotive sector, as well as in the field of building and room acoustics.

Abstract: Hybrid foam articles are provided herein, the articles including at least one layer of expandable polylactic acid (ePLA) foam and at least one layer of polyurethane (PU) foam. It has been unexpectedly discovered that replacing at least a portion of the PU foam with an equivalent volume of ePLA foam can advantageously reduce the weight of the article compared to a PU foam article, increase the flexural strength, improve the recyclability/compostability of the article, reduce the amount of polyurethane foam waste, and simply the manufacturing process of the foam article.

Abstract: A color conversion sheet according to the present invention includes a first wavelength conversion layer in which an organic phosphor is dispersed in a resin matrix, a first phosphor diffusion barrier layer positioned on one surface of the first wavelength conversion layer, and an adhesive layer positioned on one surface of the first phosphor diffusion barrier layer, wherein a Hildebrand solubility parameter of the first phosphor diffusion barrier layer satisfies a predetermined relationship between a Hildebrand solubility parameter of the resin matrix of the first wavelength conversion layer and a Hildebrand solubility parameter of a solvent contained in the first phosphor diffusion barrier layer, thereby resolving problems of changes in luminance characteristics and color change.

Abstract: A method for producing a laminate includes: a first applying step of applying a first adhesive to a first surface of a first member, the first member being made of silicone rubber, the first adhesive including a silane coupling agent having epoxy groups; a second applying step of applying a second adhesive to a second surface of a second member, the second member being made of polystyrene, the second adhesive including a silane coupling agent having amino groups; and a bonding step of the first surface of the first member and the second surface of the second member to each other with the first adhesive and the second adhesive.

Abstract: Articles are described comprising a first substrate and a second substrate. At least one adhesive layer is disposed between the first and second substrates. The article further comprises a multilayer film within at least a portion of the adhesive layer(s). Also described is a method of disassembly comprising providing an adhesively bonded article as described herein; and separating the first substrate from the second substrate by delaminating the (e.g. multilayer) film. In other embodiments, adhesive articles (e.g. tape) are described comprising a (e.g. multilayer) film and methods of making adhesively bonded articles that comprise a (e.g. multilayer) film. Also described are methods of reworking, repairing, repurposing, or recycling an article, and articles.

Abstract: The present disclosure is directed to a gypsum panel and a method of making a gypsum panel. For instance, the gypsum panel comprises: a first facing material having an outer surface and an inner surface opposing the outer surface; a thermal barrier layer adjacent the inner surface of the first paper material, the thermal barrier layer comprising a thermal additive; a gypsum core having an outer surface facing the thermal barrier layer and an inner surface opposing the outer surface, the gypsum core comprising a first filler comprising silica, alumina, or a mixture thereof; and a second facing material adjacent the inner surface of the gypsum core.

Abstract: An assembly including a first plate and a second plate, each plate having a contact surface which abuts a contact surface of the other plate to establish an interface plane, and a gradient of at least one additive that is more concentrated at the interface plane and less concentrated in decreasing amounts progressing away from the interface plane and the contact surface for at least the first plate, wherein the at least one additive alters at least one property of at least the first plate. Materials with internal gradients and methods of making same.

Abstract: A multilayer structure for transporting or storing gas including, from the inside to the outside, at least one sealing layer and at least one composite reinforcing layer, the innermost composite reinforcing layer being welded to the outermost adjacent sealing layer, the sealing layers being a composition predominantly including at least one semi-crystalline thermoplastic polymer P1i (i=1 to n, n being the number of sealing layers), the Tm of which is less than 280° C., and at least one of said composite reinforcing layers being a fibrous material in the form of continuous fibers impregnated with a composition predominantly including at least one thermoplastic polymer P2j, (j=1 to m, m being the number of reinforcing layers), the thermoplastic polymer P2j having a Tg greater than the maximum temperature of use of the structure (Tu), with Tg?Tu +20° C., Tu being greater than 50° C.

Abstract: The present disclosure provides multilayer sheet materials and methods of making the same. Specifically, layers of wood and metals are employed to construct multilayered sheets.

Abstract: A vehicle glass module (100) for supporting an information obtainer in a vehicle includes a glass substrate (1) having an outer surface (1A) and an inner surface (1B), and a bracket (6) having a first surface (6A) bonded to the inner surface (1B) of the glass substrate (1) with a bonding member (71) and a second surface (6B) opposite to the glass substrate (1). The bracket (6) includes a support (72) connected to the bonding member (71). The support (72) is in contact with the second surface (6B) and supports a weight of the bracket (6).

Abstract: A glazing assembly includes a light source for generating light which can be coupled into a first pane, an edge region which extends from a pane edge of the first pane over at least 1 mm up to at most 500 mm on one of the surfaces, and to an absorption device for absorbing light which is coupled into the first pane and is arranged in the edge region, wherein the absorption device includes a light-impermeable thermoplastic intermediate layer.

Abstract: An interlayer film for laminated glass, including a thermoplastic resin and a filler (A) having visible light reflection performance.

Abstract: A polymer film including a first portion and a second portion laminated with the first portion. Each portion independently consists of one or more layers. The first and second layers each independently have a melt index ranging from 3.5 g/10 min to 10.0 g/10 min, and lower than 3.5 g/10 min, respectively. Each layer of the first portion independently has a product of its melt index and a thickness ratio of its thickness to the total thickness of the first and second portions, such that the sum of the product of each layer of the first portion ranges from 0.39 g/10 min to 2.50 g/10 min. Each layer of the second portion independently has a product of its melt index and a thickness ratio of its thickness to the total thickness of the first and second portions, such that the sum of the product of each layer of the second portion ranges from 1.10 g/10 min to 2.95 g/10 min.

Abstract: Laminates and interlayers thereof are provided. The laminates may include a first optically transparent sheet, a second optically transparent sheet, and an interlayer. The interlayer may be interposed between the first and second optically transparent sheets, and may couple the first and second optically transparent sheets with one another. The interlayer may include one or more structural support layers and one or more polymeric layers. A first polymeric layer of the one or more polymeric layers may include a luminophore. The interlayer may be substantially free of plasticizers.

Abstract: This application provides a method for preparing laminated glass sandwiching an electronic device. The device may include a device body, a conductive substrate, a conductive adhesive tape electrode, and a lead-out electrode. The conductive adhesive tape electrode has at least one surface coated with conductive adhesive and is attached to the conductive substrate, the lead-out electrode is configured on the conductive adhesive tape electrode or the conductive substrate and is conductively connected to the conductive adhesive tape electrode. The preparing method may include configuring a protective layer on the conductive adhesive tape electrode, covering and sealing the conductive adhesive tape electrode onto the conductive substrate; and sandwiching the electronic device between two glass pieces and pressing the two glass pieces together to form the laminated glass.

Abstract: A polymer film is provided. The polymer film sequentially includes a first layer, a second layer and a third layer, where the two surfaces of the second layer are in contact with the first layer and the third layer, respectively. The first layer has a first melt index, the second layer has a second melt index, and the third layer has a third melt index. The second melt index ranges from 3.5 g/10 min to 10.0 g/10 min, the first melt index and the third melt index are independently lower than 3.5 g/10 min, and the difference between the second melt index and the first melt index, as well as the difference between the second melt index and the third melt index independently range from 0.2 g/10 min to 8.5 g/10 min.

Abstract: The invention relates to a multi-layer structure (MA) comprising: (S1) at least one first outer layer (S1) containing a polymer (P1) having a Vicat softening temperature ?149° C., preferably ?160° C., further preferably ?170° C., more preferably ?180° C., determined according to ISO 306:2004 (50N; 50° h); (S2) at least one further polymer layer (S2) containing a polymer (P2) having a Vicat softening temperature <149° C., preferably ?140° C., more preferably ?130° C. determined according to ISO 306:2004 (50N; 50°/h), preferably in a range from 120 to 148° C.; (S3) at least one core layer (S3); (S4) at least one further polymer layer (S4) containing a polymer (P2) having a Vicat softening temperature <149° C., preferably ?140° C., more preferably ?130° C., determined according to ISO 306:2004 (50N; 50° h), preferably in a range of 120 to 148° C.; (S5) at least one second outer layer (S5) containing a polymer (P1) having a Vicat softening temperature ?149° C., preferably ?160° C.

Abstract: A polypropylene multilayer sheet comprising: a first biaxially oriented polypropylene layer having a melting point Tmh; and a second biaxially oriented polypropylene layer having a melting point Tml, the first biaxially oriented polypropylene layer and the second biaxially oriented polypropylene layer being alternately laminated, the polypropylene multilayer sheet having a thickness of 0.20 to 3.0 mm, wherein Tmh>Tml, and a total number of layers is 3 to 11.

Abstract: A recyclable, paper-based packaging article formed of a laminated web comprises a first paper ply and second ply. A first adhesive layer is disposed between the first paper ply and the second ply, the first adhesive layer securing the first paper ply to the second ply. The first adhesive layer is selectively applied in a predefined pattern to create non-adhesive regions between the first paper ply to the second ply, whereby air gaps are created between the first paper ply to the second ply. The first and second plies are adjoined via the first adhesive layer to form the laminated web. The first paper ply comprises about 80% to about 99% based on the total weight of the laminated web.

Abstract: A slip-resistant article includes a traction layer, a substrate layer, and an adhesive layer. The traction layer includes a polyolefin resin and a halogen-free flame retardant and has a first major surface with static coefficient of friction greater than or equal to 0.6.

Abstract: A method for manufacturing a panel including a plurality of partitions defining cells covered by at least one skin, the skin being formed by draping fibrous structures impregnated with a thermoplastic material on the upper edges of the partitions by automatic placement of fibers, the upper edges of the partitions and the fibrous structures being joined together with the aid of a localized heating device at the moment they are placed in contact, the method wherein the fibrous structures are draped with a draping tension on the interface between each edge of a partition and the deposited fibrous structure applying a shear stress of between 50% and 80% of the maximum shear stress before rupture of the interface.

Abstract: A slab processing machine includes a work table, a machining head and drive mechanism. A controller operates the machining head to mill a section of the rough side opposite the finished face of the slab that is positioned upside down on vacuum pods on the work table using a milling wheel received within the machining head, corresponding to side edge areas of a finished cut slab and lamination strips configured to build up the side edge areas of the finished cut slab. The machining head cuts the slab using a circular saw blade that had been switched out and received within the machining head into a final geometrical form for the finished cut slab and into the lamination strips.

Abstract: An on-machine development type planographic printing plate precursor has a support and an image-recording layer on the support. The image-recording layer contains an initiator, an infrared absorber capable of donating electrons to the initiator, and a color-developing substance precursor. The image-recording layer can form an image by exposure to infrared laser, and in a case where the image-recording layer is exposed to an infrared laser with a wavelength of 830 nm at an energy density of 110 mJ/cm2, a brightness change ?L of the image-recording layer before and after the exposure is 3.0 or more. A method for preparing a planographic printing plate and a planographic printing method employ the on-machine development type planographic printing plate precursor.