Method of improvement of efficiency of printing of flexographic printing elements
FIELD: printing industry.
SUBSTANCE: in implementing the method, the selective ablation of the masking layer is carried out to create on the masking layer on the entire image which comprises a fragment of the image containing the cell structure. On the masking layer the oxygen barrier layer is applied. Then, the printing element is exposed by the actinic radiation through the barrier and the masking layers for selective crosslinking and cure of at least one light-cured layer to create the relief image and a textured surface on the printing element. The performs of the printing element are developed by removing the barrier layer and uncured parts of the light-cured layer to reveal a relief image.
EFFECT: improvement of printing quality.
16 cl, 1 tbl
SUBSTANCE: method includes forming a near-field mask on the surface of a dielectric substrate and irradiating the obtained structure with a femtosecond laser pulse. The laser radiation is first passed through a nonlinear optical crystal with a coefficient of transformation into a second harmonic equal to 5-7%. The dielectric substrate coated with the near-field mask is irradiated with the obtained bichromatic femtosecond pulse with energy density in the range of 25-40 mJ/cm2, which is less than the laser radiation energy density normally used in similar nanopatterning.
EFFECT: high resolution and low laser radiation energy consumption.
SUBSTANCE: in one version, a light-curable printing plate workpiece comprises a base layer on which there is at least one light-curable layer, a barrier layer placed on at least one light-curable layer and a laser-removable masking layer on top of the barrier layer, wherein the method includes steps of: a) rendering at least one light-curable layer via selective laser ablation of the laser-removable masking layer in order to form an image, b) exposing the printing plate workpiece through the barrier layer and the masking layer to one or more actinic radiation sources for selective crosslinking and curing of portions of at least one light-curable layer, wherein at least one light-curable layer is crosslinked and cured on portions which are not coated by the masking layer, thereby forming a prominent structure, and c) developing the printing plate workpiece in order to remove the barrier layer, the masking layer subjected to laser ablation and uncured portions of the light-curable layer and developing the prominent structure, where the step of developing the printing plate workpiece includes steps of: i) softening non-crosslinked portions of at least one light-curable layer by heating at least one light-curable layer to a temperature where the non-crosslinked portions of at least one light-curable layer soften, while cured portions of at the least one light-curable layer remain solid, and ii) removing the non-crosslinked portions of the light-curable layer by bringing the printing element into contact with an absorbent material which is capable of absorbing a non-crosslinked photopolymer, through which the prominent structure is developed. The barrier layer has an oxygen diffusion coefficient less than 6.9×10-9 m2/s and optical transparency of at least 50%.
EFFECT: forming a prominent structure having a plurality of prominent points.
32 cl, 4 dwg
SUBSTANCE: invention relates to the field of lithography and relates to a support structure of the substrate. Pressing the substrate to the surface of the support structure is carried by a capillary layer of liquid. The surface of the support structure has an outer edge and comprises the support elements intended for receiving a pressed substrate in multiple support locations. The support structure of the substrate additionally comprises a sealing structure which limits the surface and has an edge forming a sealing rim. The distance between the outer edge of the surface and the outermost of the support locations is greater than the distance between the outer edge of the surface and the sealing rim. The distance between the sealing rim and the outermost location of the support is greater than the maximum distance between the adjacent support locations.
EFFECT: technical result consists in increasing clamping force, reduction of contamination of the vacuum environment and increase in the lifetime of the device.
15 cl, 30 dwg
SUBSTANCE: invention relates to the field of lithography and relates to methods of manufacturing of cylindrical photomask provided with nano-pattern. The method comprises applying a layer of elastomeric material on the transparent cylinder with the subsequent formation on the elastomeric material of the pattern elements ranging in size from 1 nm to 100 mcm. Formation of the pattern elements is carried out by transferring the pattern elements with preliminary fabricated template, or using a process of direct formation of the pattern on the elastomeric material. Embodiments of the method comprise formation of the pattern with the elements in size from 1 nm to 100 microns on the elastomeric material, followed by lamination of the elastomeric material provided with nano-pattern on the surface of the cylinder.
EFFECT: providing the ability of manufacturing the nanoscale elements using the method of near-field lithography.
25 cl, 20 dwg
SUBSTANCE: lithographic machine comprises a projection lens system (132) for focusing one or more exposure beams on a target, a movable table (134) for moving the target (9), a capacitive measurement system (300) for taking measurements associated with distance between the last focusing element (104) of the projection lens system and the surface of the target (9), and a control unit (400) for controlling movement of the movable table (134) for adjusting the position of the target (9) partly based on the signal from the capacitive measurement system. The capacitive measurement system (300) comprises a plurality of capacitive sensors (30), each having a thin-film structure. The capacitive sensors and the last focusing element (104) of the projection lens system are mounted directly on a common base (112), and the sensors are situated in the immediate proximity to the edge of the last focusing element of the projection lens.
EFFECT: high resolution and accuracy of the lithographic machine.
16 cl, 32 dwg
SUBSTANCE: invention relates to a method of adapting the form of printing dots created in the manufacture of printing forms for relief printing, and can be used for printing on a variety of substrates such as paper, cardboard, corrugated cardboard, films, foil and laminated materials. In the method of controlling the shape of a plurality of relief dots created in the process of digital manufacture of printing forms on the photosensitive preform, the latter comprises a laser-removable masking layer located on at least one light-curable layer. The masking layer is applied directly or indirectly to at least one light-curable layer. The method of controlling comprises the step of laser ablation of the laser-removable masking layer to create a negative in the laser-removable masking layer. In addition, the method comprises the step of applying directly on the created negative of the barrier membrane which comprises at least two resins. Then exhibiting of at least one light-curable layer with actinic radiation is carried out directly through the created negative. After that the exposed photosensitive preform is developed with an image in order to display of a relief image on it, comprising a plurality of relief printing dots. The form of relief printing dots is changed or adapted by changing the type at a ratio of at least two resins. The relief printing dots have at least one geometric characteristic selected from the group comprising a plane of upper surface of the printing dots, the shift angle of the dots and the acuity of the boundary of the printing dots. These steps are optionally performed in the said order, and at least two resins are shellac and polyvinyl butyral.
EFFECT: providing the opportunity of obtaining various forms of dots and targeted regulation of dot form by changing the ratio of the membrane components.
15 cl, 12 dwg
FIELD: physics, optics.
SUBSTANCE: device has a base and a plurality of convex and concave structural elements arranged on the surface of the base with spacing which is equal to or less than the wavelength of visible light. The structural elements form a plurality of tracks and form a structure of a quadrangular or quasi-quadrangular array. In one version, each structural element has the shape of an elliptical or truncated elliptical cone, the long axis of which is parallel to the track. In another version, the ratio ((2r/P1)×100) of the diameter 2r to the spacing P1 is 127% or higher, where P1 is the spacing between structural elements on the same track, and 2r is the diameter of the lower surface of the structural element in the direction of the track. The method is carried out by forming a resist layer on the peripheral surface of a columnar or cylindrical standard mould, forming latent images via interrupted irradiation of the resist layer with a laser beam while rotating the standard mould with relative displacement of the laser beam spot parallel to its central axis, forming a resist structure via development thereof and forming structural elements by etching using the resist structure as a mask.
EFFECT: improved antireflection characteristics.
12 cl, 6 tbl, 67 dwg
SUBSTANCE: present invention is an exposure device for exposing a photo-aligned film disposed on a substrate. The exposure device includes a light source and a photomask and exposes the photo-aligned film through the photomask, while scanning the light source or the substrate. When the direction in which the light source or substrate is scanned is selected as the scanning direction, and the direction which is orthogonal to the scanning direction is selected as the vertical direction, the photomask includes a first region and a second region which borders the first region in the vertical direction. The first region includes a plurality of first transparent parts inside a second light-protective part. The plurality of first transparent parts is arranged in the vertical direction. The second region includes a plurality of second transparent parts inside the second light-protective part. The plurality of second transparent parts is less than the plurality of first transparent parts. The plurality of second transparent parts is arranged in the vertical direction and is discretely dispersed in the scanning direction.
EFFECT: providing an exposure device which can prevent visual recognition of unevenness of display on the interface area, even if scanning is temporarily stopped during scanning exposure.
28 cl, 21 dwg
SUBSTANCE: original drawing is converted to a raster pattern in digital form and information on amplitude and phase, characterising each point of the raster pattern as an extended or point radiator, is recorded. Parameters of the physical structure of the projection mask, which are used to subsequently calculate an optimised electromagnetic field, are calculated. The process of the field forming a topology image on a photosensitive material is simulated in digital form and the match between the model of the digital raster pattern of the topology image and the digital raster pattern of the original drawing is evaluated. If the mismatch is greater than a given mismatch, parameters of the physical structure of the projection mask are adjusted. The procedure is repeated several times until achieving the given match. The resultant digital form of the electromagnetic field is used as the origin for calculating the digital raster pattern of the hologram and as a modulation signal for the radiation beam forming a diffraction structure on a carrier.
EFFECT: reduced deviation of the shape of resultant drawing from the given drawing, high contrast of the resultant drawing and low noise level in illuminated and non-illuminated regions of the drawing.
SUBSTANCE: node (4) for submission of printing plates and output of printing plates, which delivers a printing plate (P1) into the block (3) of drawing, takes a printed form (P2), which is obtained by drawing the image on the printing plate (P1) of the block (3) of drawing, and gives it to the processing unit. The node (4) for submission of printing plates and output of printing plates includes a table (41) for feeding printing plates, which provides the printing plate (P1) buoyancy at atmospheric pressure, moves the printing plates (P1) in the state in which its buoyancy is provided at the atmospheric pressure, over the table (41) for feeding printing plates, and delivers it to the block (3) for drawing.
EFFECT: prevention of damage of printing plates and printed forms in the device for feeding printing plates and output of printing forms.
17 cl, 30 dwg
FIELD: printing industry.
SUBSTANCE: invention relates to the field of printing industry. A magnetic plate comprises a sheet or a block from magnetised composite material, having multiple areas arranged along its surface. At the same time the first area on the specified surface is magnetised by exposure to magnetic field with the help of a magnetising matrix of certain shape, having an external surface in the form of an image, a logo or a symbol. Besides, the first area is magnetised so that it is shaped accordingly to the specified image, logo or symbol, and creates the first magnetic field with the specified direction, and the second area on the surface of the sheet or the block that surrounds the specified first area is either not magnetised or is magnetised differently compared to the first area, as a result there is contrast provided between the created or magnetic fields.
EFFECT: group of inventions makes it possible to simplify manufacturing of a magnet and to increase extent of flexibility in respect of the magnetic field created by the magnet.
16 cl, 33 dwg
FIELD: process engineering.
SUBSTANCE: proposed method of producing plate for intaglio printing consists in programmed engraving of the plate made by computer-aided engraving tool. Said not engraved plate makes intermediate plate for plate with polymer layer for intaglio printing. Note here that said intermediate plate polymer layer is engraved by computer-aided engraving tool.
EFFECT: high-resolution engraving, reduced production time and costs.
10 cl, 15 dwg
FIELD: printing industry.
SUBSTANCE: invention relates to production of printing production and concerns device for paintless relief stamping. Contains punch with relief work surface and counterpunch with flat work surface, made from porous polyurethane, placed on base from solid polyurethane and covered from bottom and from above with layers with low friction coefficient.
EFFECT: invention allows to increase endurance of device and its efficiency.
FIELD: printing industry.
SUBSTANCE: invention relates to technology of manufacturing printing forms for offset printing. Method of manufacturing printing forms for offset printing is realised by changing properties wettability of areas of work surface of printing forms, transformation of properties being realised due to change of chemical composition of work surface influencing on chosen areas by flux of accelerated particles. As substance of work layer applied is two- or poly- atomic inorganic material based on carbon with addition of aluminium atoms 0.01-20-at.% with thickness 1-1000 nm, which is covered on bottom layer with applied on it layer of aluminium or alloys on its base or on bottom layer from aluminium or based on it alloys.
EFFECT: invention allows to simplify and accelerate manufacturing process, increase of resolving capacity and endurance of providing multiple application of forms.
6 cl, 4 dwg, 1 tbl, 5 ex
FIELD: printing industry, chemistry.
SUBSTANCE: foil for hot stamping includes polyethylene terephthalate film of hot stamping and coating on the basis of thermoplastic bounding agent and pigment. Co-polymer of vinyl chloride with vinyl acetate in 86:14 ratio and molecular weight 27000 is used as bounding agent under the following proportions of components, wt %: Co-polymer of vinyl chloride with vinyl acetate 5-55; pigment is the rest of content.
EFFECT: improved quality of paint layer transfer from film to convex surface of vehicle registration sign.
FIELD: printing form for printing of, in particular, securities and documents, and a printing method.
SUBSTANCE: printing form contains, at least, two functional layers 1 and 2, first one of which is made with through printing elements 3 and 4 for transferring painted image directly onto carrier material 5. Printing form has means 8 for tearing paint layer and redistributing paint in printing elements between layers, which means may be made in form of a mesh or honeycombed structure between layers 1 and 2. In accordance to invention, printing method includes transferring form pattern onto carrier material by means of described printing form, while during printing pressure is created in printing zone, value of which exceeds the yield point value of the carrier material.
EFFECT: possible creation of imprints, analogical to metallographic printing imprints, with more complicated structure and increased degree of protection from forgery; improved quality of imprints due to decreased probability of spraying of paint across space sections of form during printing, and also due to fine-grain structure of imprint surface with high productivity and possible use of broad assortment of painting materials.
4 cl, 12 dwg
SUBSTANCE: method comprises exposing photosensitive layer applied on magnesium plate to ultraviolet radiation, etching in nitrogen acid, removing photosensitive layer, washing in fresh water, and drying.
EFFECT: enhanced quality of printing plate.
FIELD: process engineering.
SUBSTANCE: proposed method comprises two stages of machining, at least, one 3D microstructure by cutting to remove functional layer of said microstructure. At first stage, cutting is made by high-speed milling. Note here that conical milling cutter is used to remove main part of functional layer material with allowance for finishing retained. At second stage, machined surface is subjected to single or twofold indenting. Note that functional layer material is removed with the help of polyhedral, primarily, trihedral pyramidal cutting tool, every side of which making tool front surface, while tool replacement is carried pout automatically. Said finishing is made in one pass along the microstructure contour by planning at second stage. Note here that first and second stages are performed by aforesaid one tool.
EFFECT: better milling performances.
6 cl, 10 dwg