Mitigating trailing edge voids in flexographic printing
a flexographic printing and trailing edge technology, applied in the direction of plate printing, foil printing, photomechanical equipment, etc., can solve the problems of large voids, pattern performance poor, and no possibility of fine control of relief properties
Active Publication Date: 2018-12-13
MIRACLON CORP
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Benefits of technology
This approach effectively eliminates voids at the trailing edge of relief features, ensuring uniform ink deposition and improved ink density, while maintaining edge definition and resistance to voids.
Problems solved by technology
In a traditional flexographic prepress process with chemical etching, there is no possibility of fine control of relief properties other than the relief depth.
When printing on plastic substrates, voids can appear in large features due to air entrapment.
The pattern can also perform poorly if large volumes of ink need to be transferred to the substrate 22.
However, a coarser pattern will compromise edge definition.
In flexographic printing, large solid areas of a relief pattern can suffer from a number of artifacts.
The ink can deposit unevenly, resulting in a reduction in ink density, and in the solid area having a mottled appearance.
A weakness of this method is that the interior pattern cannot be simultaneously optimized for both uniform ink deposition and resistance to voids at the trailing edge of large relief features 402.
Method used
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[0048]The invention is inclusive of combinations of the embodiments described herein. References to “a particular embodiment” and the like refer to features that are present in at least one embodiment of the invention. Separate references to “an embodiment” or “particular embodiments” or the like do not necessarily refer to the same embodiment or embodiments; however, such embodiments are not mutually exclusive, unless so indicated or as are readily apparent to one of skill in the art. The use of singular or plural in referring to the “method” or “methods” and the like is not limiting. It should be noted that, unless otherwise explicitly noted or required by context, the word “or” is used in this disclosure in a non-exclusive sense.
[0049]In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the disclosure. However, it will be understood by those skilled in the art that the teachings of the present disclosure ma...
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Abstract
A method for forming a flexographic plate for an image pattern including image features. The image pattern includes an array of image pixels, wherein the image pixels include printing pixels corresponding to portions of the image pattern where ink is to be printed on a substrate by the flexographic plate. Edge regions and interior regions of the image features are identified, which are separated by gap regions. A fine texture pattern is applied to the edge regions and a coarse texture pattern is applied to the interior regions to form a textured image pattern which is used to form the flexographic plate. No texture pattern is applied to the gap regions thereby leaving gaps between the edge regions and the interior regions of the image features.
Description
FIELD OF THE INVENTION[0001]The present invention relates to a method forming an image on a flexographic plate.BACKGROUND OF THE INVENTION[0002]In graphic arts technology, a number of well-established printing processes utilize image carriers with a three-dimensional (3D) representation of data, the most popular of them being flexographic printing, which uses flexible relief plates or sleeves. A relief plate includes raised relief features, which are raised above the plate floor. It is the raised features that accept and transfer ink to the substrate. In a traditional flexographic prepress process with chemical etching, there is no possibility of fine control of relief properties other than the relief depth.[0003]Flexographic printing uses a flexible relief plate 20 to print on a wide variety of substrates including paper, cardboard, plastic, and metal films. A simplified diagram of a flexographic printing press 30 is shown in FIG. 1. Ink 10 in a fountain pan 26 is taken up by a rub...
Claims
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IPC IPC(8): B41N1/12G03F7/11
CPCB41N1/12G03F7/11B41C1/00G03F7/2022H04N1/405H04N1/4057G03F7/2016
InventorBIELAK, RICHARD ROMAN
OwnerMIRACLON CORP