Abstract:
An imaging member includes a surface layer comprising a fluoroelastomer-perfluoropolyether composite formed from a reaction mixture comprising a fluoroelastomer and a perfluoropolyether compound. Methods of manufacturing the imaging member and processes for variable lithographic printing using the imaging member are also disclosed.
Abstract:
An imaging member includes a surface layer comprising a fluoroelastomer-perfluoropolyether composite formed from a reaction mixture comprising a fluoroelastomer and a perfluoropolyether compound. Methods of manufacturing the imaging member and processes for variable lithographic printing using the imaging member are also disclosed.
Abstract:
The invention is a method for the fabrication of an imprint tool master. The process begins with a metallic substrate. A layer of photoresist is placed onto the metallic substrate and a image pattern mask is then aligned to the mask. The mask pattern has opaque portions that block exposure light and nullopennull or transparent portions which transmit exposure light. The photoresist layer is then exposed to light transmitted through the nullopennull portions of the first image pattern mask and the mask is then removed. A second layer of photoresist then can be placed onto the first photoresist layer and a second image pattern mask may be placed on the second layer of photoresist. The second layer of photoresist is exposed to light, as before, and the second mask removed. The photoresist layers are developed simultaneously to produce a multi-level master mandrel upon which a conductive film is formed. A tool master can now be formed onto the conductive film. An imprint tool is then produced from the tool master. In one embodiment, nickel is electroplated onto the tool master to produce a three-dimensional imprint tool.
Abstract:
A matrix board coating composition for use in the formation of a mold in which flexographic printing plates are produced, the coating is a water-based, latex emulsion having a two step phenolic component to increase shelf life, reduce volatiles and improved flow properties of the coating.
Abstract:
A low fiber, high filler content matrix board is provided. The matrix board is characterized by a total mold shrinkage of not more than 0.002 "/", wherein the shrinkage is substantially non-directional. In addition to the fibers and fillers, the board further comprises a resin binder. A matrix mold made from the board is provided together with a method for forming a flexographic printing plate from such a matrix mold and a printing plate made according to this method.
Abstract:
The present invention is an improved replication process which copies a master pattern onto an intermediate transfer mask which is then used to form a lithographic mask on the surface of a substrate. A pattern derived from the original master pattern is then produced in the substrate by an etching process.
Abstract:
A method for producing embossed designs on work surfaces such as on molds, rolls or dies. A photomechanically imageable transfer material is exposed to the design to be embossed. The material is developed and the acid resistant design material remaining on a backing sheet is mechanically transferred to the work surface by burnishing the back of the backing sheet. The surface is then etched and the acid resistant design elements removed so that the embossed work surface is ready for use.
Abstract:
The method of casting a representation of a photograph that includes forming an etched plate through a half-toned screen of the photograph, making a mold cavity of the plate, making a wax impression of the rubber mold with the wax impression not completely copying the rubber mold, forming a casting of the wax impression, coloring the surface of the casting and sanding and burnishing the surface to remove the coloring from the high areas to produce a cast surface having tonal and height contrasts.
Abstract:
A printing plate matrix is presented including mineral and/or organic fibers, thermosetting resin, and glass microbubbles uniformly dispersed throughout the material.
Abstract:
A matrix for plastic letterpress printing plates and the method of formation thereof are presented wherein the matrix material prior to molding is thicker than the desired molded matrix. The "non-printing" areas of the matrix are compressed to at least seventy percent of the density of the compressed "printing areas" in forming the matrix, and the matrix may then be ground to desired thickness to obtain desired heat transfer characteristics.