Printing master plate

Synthesis and Properties of Photopolymer Printing Plates for a Printing Master Plate by Modification of Polyvinyl Alcohol... 

Therefore, metal plates have been conventionally used. We have performed the research and development of a photopolymer printing plate for a master plate with a new basic structure by combining an oligomer of urea structure having a polyvinyl base with polyvinyl alcohol, photopolymerization initiator and other ingredients. The result shows that the newly developed plate (6) is so good that it has replaced metal plates and has been stably used at leading newspaper companies in Japan where several millions of newspapers are daily issued. 

When the hardness has reached this level, the plate can be a practical printing master plate for making paper mold and matrix. 

The Photopolymer Plate of over 85° Shore D hardness can stand temperatures over 160°C, and it could be successfully used as a master plate for making thermoformed matrix of phenol group resin to be used for thermoformed polymer printing plates such as rubber plates and the like under conditions of 30 kg/cm2 pressure... 

The Photopolymer Plate, a water developable photopolymer relief printing master plate made by modification of polyvinyl alcohol with urea group oligomer having a functional polyvinyl base, for making paper mold and matrix for printing master plates, has characteristics which are very close to those of the conventionally etched metal relief printing plates and has some superior points to them. 

Fig. 7.6. (a) Standard screen-printing equipment, (b) Master plates leaving the in-line drying furnace after screen-printing, (c) Master plates after sintering in a batch oven... 

Endo, A. Lithographic printing master plate containing dye compound and phenolic resin. Jpn. Kokai Xokkyo Koho JP 2004061947, 2004 Chem. Abstr. 2004, 140, 225820. 

To master one scientific topic after another, Haber skipped dinners and studied until 2 a.m. With overflowing enthusiasm, he ignored the conventional boundaries between abstract and practical science between chemistry, physics, and engineering and between mechanics, technicians, and scientists. He solved industrial problems posed by the iron plates used to print banknotes and by Karlsruhe s corroded water and gas mains, and then made fundamental discoveries in electrochemistry. Conversely, he used the abstract theory of gas reactions in flames to explain to manufacturers why some reactions continue spontaneously while others stop. Soon he had contributed basic scientific insights to almost every area of physical chemistry. 

Manufacture of Duplicating Plates These applications include electrotypes, gramophone record masters, and security printing plates. 

Stamps and molds are usually prepared from a master with relief structure on its surface by replica molding where the elastomer precursor is cast onto the master and is peeled off after polymerization. As elastomer most notably polydimethyl-siloxane (PDMS) is used. With micro-contact printing, a nonphotolithographic technique, the stamp prints the replica information onto a support, often in the form of self-assembling monolayers changing the surface characteristics to lipophilic on the contact spots (Fig. 18.4). The noncontacted area can be etched off or plated by deposition in an ensuing step. " ... 

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