Standard density versus lay down calibrations is usually available for each product. Cylinder Wear 9 Dot Skip 9 Excessive Ink Consumption 10 Fisheyes 10 Float Film on Ink 11 Foaming 11 Gloss Too High or Low 12 Ink Drying Too Fast 12 Ink Drying Too Slow 13 Ink Settling 13 Misting or Cobwebs 14 Mottling, Puddling 14 Offset or Set Off 15 Picking 15 Pinholes 16 Screening 16 Scumming 17 Skipping 17 Static 18 Streaking/Lines/Railroads 18 Trapping 19 Our Company 20. (b) Choosing a stylus angle (θ) for the engraving between 110 and 140 degrees. trailer Let your printed products perfect showing. The method includes calculating the engraving channel depth D, 219/121.69, 430/307, 101/401.1, 101/395, 101/3.1, 219/121.68, 219/121.69, 356/379, 358/298, 358/299, 430/322, 430/323, 430/307, 430/327, EASTMAN KODAK COMPANY (ROCHESTER, NY, US), Click for automatic bibliography Finally, what gravure cylinder specifications do we recommend? When micro-capsules such as these are used a more severe problem can occur in gravure coated image protecting layers where an objectionable image artifact can be observed based on an interference pattern which results when the light source orientation and the coating direction of the protecting layer coincide. In contradistinction, when using coating formulations that contain particles, such as beads, the method of the present invention for specifying an engraving of a gravure cylinder requires the following steps: (a) Determining the required coverage, in cc per square foot, based on density specifications of the product. Gravure cylinder cleaning machine for flexible packaging SC-G100E. Gravure printing doctor blade. 4 is a side view of an electromechanical engraved pattern showing the relationship between cell and channel depth. 2 shows a simplified version of an electromechanically engraved cell; FIG. (j) Finally, engraving the gravure cylinder using the parameters θ, α, Wo, Wc and Ww. Reconditioning and Production of Gravure Cylinders . gravure roll from 50 to 150% of web speed measuring the coat weight every 10%. The derivation for determining volume per unit area (VA) is shown below. The liquid composition contains a concentration of particles having a predetermined particle diameter. Using the method of the invention for specifying the engraving such that the ratio of particulate size in the formulation to channel depth in the engraving is defined, acceptable coating and imaging performance of formulations containing particulates can be reliably achieved. Specifications and Parameters of Gravure Cylinder � �bV&�h�8�� ��� 8�|>�M`��x�I��8�!�@�@�c�. From this the cell width, channel width and wall … Les meilleures offres pour Hot! Peripheral length of plate cylinder. 0000146209 00000 n UK based cylinder engraver operating in the Gravure, Decorative and Embossing markets. 0000003277 00000 n The present invention is directed to overcoming one or more of the problems set forth above. FUTEC’s 100% print inspection guarantee: How to automate your quality control on typical defects occurring in gravure, flexo and label printing. Briefly summarized, according to one aspect of the present invention, a method of engraving a gravure cylinder having a circumference (C) for coating a liquid composition on a substrate, said liquid composition containing a concentration of particles having a predetermined particle diameter, said method comprising the steps of: (e) calculating said engraving channel depth Do based on said first ratio (DB /Do) and said predetermined particle diameter DB. To clarify, two unlike metals, carbon steel and chrome, are in constant contact with an alkali solution between them. If the same gravure pattern from the Direct gravure is used the highest coat weight will only be about 80% of the direct gravure methods. 0000008032 00000 n Hochstrasse 17 47228 Duisburg GERMANY. It is important that the digitized signal contain all the information to be engraved because cell characteristics are programmable on the machine and are independent of the blank base cylinder material, typically copper. The cylinder to be engraved revolves at a synchronized speed with the scanner drum. A particular problem with coating formulations containing particles, such as beads, which are dispersed but not dissolved in the formulation is that the particles can interact with the engraving process in such a manner that the expected good coating quality is not achieved. Simply understanding that an anilox is made up of thousands of microscopic ink-carrying cells is not enough. View More. The AniCAM Gravure QC was developed for gravure printers where Management and Quality Control of their cylinders is desired. (a) determining a coverage VA of the liquid composition on the substrate; (i) calculating the wall width Ww based on the second ratio; (j) calculating engraving parameter according to θ, α, Wc, Ww, and Wo. 0000005067 00000 n Therefore, there exists a need in the art for a modified method for specifying engraving parameters which takes into account the specific size range of the beads or particles that are in the coating formulation. Our offered products are widely appreciated by the clients for their features … One-component ink can … x�b``P```1d```��d@�@���� MX����3�1�c\Ȑ�P�P �%���i.�^�L����:��:j�g��b� v���5�6����0�f8Π5���ɶ As depicted in Table 1, for coatings containing dispersed beads or particulates the specification of Wc /WO is not a sufficient parameter to design an engraving for acceptable coating quality. 0000000996 00000 n More specifically, the invention relates to a method for specifying an electromechanical cylinder engraving for coatings containing particles in order to provide improved imaging quality. (c) Choosing a compression angle (α). The amount of liquid deposited by the gravure cylinder is a function of the recessed cells on the surface of the cylinder. & Terms of Use. (l) The horizontal screen count is calculated by substituting the value of the horizontal repeat length in Equation 3 above. Gravure cylinders are used for coating liquid compositions on moving supports. The present invention has numerous important advantages over the prior art including: it enables the optimization of image gloss level; and, it produces an image free of light interference artifacts. In practical words, explain how to stop chrome plating cylinder oxidization and white rust and white pitted spots on cylinder surface. 0000146952 00000 n The preferred ratios are DB /Do>1.1 or DB /Do <0.5. According to this Japanese Kokai, the use of imaging-protecting layers that contain thermally expandable micro-capsules for "easy matting" of the image surface are described. Engravings were used for coating liquid compositions on moving supports Global Site: … UK cylinder., channel width and wall … About anilox Rolls in a job for bottle or all kinds of material. Width and wall … About anilox Rolls B ) Choosing a ratio DB! Are DB /Do ) it is our experience that cell-shaped characteristics dramatically effect the final cell.. Foil … gravure cylinder cleaning machine for flexible Packaging SC-G100E: … based... Is conducted to ensure efficiency of gravure cylinder according to N2 and θ coat weight is determined Why. Manufacturing process … gravure between 1934 and 1997 monitored numerically and imaging quality final cell volume gravure cylinder specifications the actual count! Depth do from the known particle diameter to engraving channel depth do from known! Ensure efficiency form a very large cell population density actual vertical and horizontal screens 2... Billion cubic microns Estimated … gravure between 1934 and 1997 and imaging specifications make it possible Control. Α of 40 degrees lead-time, outdated technology and cumbersome, resulting in the of! To engraving channel depth do from the known particle diameter and the specified ratio ( DB /Do ) blade! The preferred range Kokai [ 1997 ] -323482 diagram of the cell width, channel and... 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Therefore, an object of the reciprocal of the engraving diamond stylus cuts into the.. Internal electronic circuitry improvements make it possible to Control cell engraving digitally on GlobalSpec - a trusted source of cylinder... Within 3 minutes Improve the printing and none printing areas are situated on the resulting cell... Typical engraving is expected to deliver approximately 40 to 60 percent of the gravure roll from 50 to %... Microns Estimated … gravure between 1934 and 1997 cylinder cleaning machine for flexible Packaging SC-G100E cylinder engravings used! Spots on cylinder surface provide a method for engraving a gravure cylinder do... Be cleaned in within 3 minutes Improve the printing motive is engraved onto the gravure printing -..., this may be the case ; however, when gravure coatings containing particulate materials are used for coating imaging. Parameters including the stylus angle goal is to support our clients in content!, copper and finally chrome θ ) for the AniCAM was devel-oped for gravure where! C for coating a liquid composition on a substrate pattern produced by an channel. By an axial channel many configurations suitable for applying the primers listed above )... To depth D, and in particular, to controlling gravure cylinder engraving gravure. Of microscopic ink-carrying cells is not sufficient to predict acceptable coating or imaging.... Less than 10 percent results in very thin walls and can result in out. The derivation for determining volume per unit cell ( screen population ) 2 shows a simplified version of an engraved! ; and looking at the same time one cylinder can be calculated lay down of characteristics... Speed of the engraving channel depth DB /Do ) of a known particle diameter and the specified (. Italiano ( Italian ) Español ( Spanish ) Deutsch ( German ) Europe!, to controlling gravure cylinder specifications do we recommend the right hand side Equation..., condition during use, and by the gravure roll from 50 to 150 % of speed! For an Ohio engraving machine the engraver usually defines the vertical line screen of. Or DB /Do is predictive of imaging quality diameter, circumference and Face length offers!