A rotatory press is a printing press that the images to be printed are curved around a cylinder. The printing can be made on the great number of the substrates paper, paperboard and plastic. The substrates can be food of sheet or unrolled on a continuous bearing by the pressure to print if there are place and being still modified (cut of matrix, varnished printing in overload, and engraving in relief). Presses which employ the rotary bearings continuous indicated sometimes under the name of "presses". Rotary drum printing was invented by Richard March Hoe, and then significantly improved by William Bullock. Specific machines printing of wallpaper, with the assistance most of the time of the print rolls out of wood were, largely widespread in the whole of Europe . Today, there are three principal types of rotatory pressures; offset generally known like offset printing uninterrupted, rotogravure, and flexo (abbreviation the flexography). While the three types use cylinders to print, they change in their method.
Offset lithography uses a chemical process which an image is chemically applied to a plate (generally through exposure of photosensitive layers on the plate material). Lithography is based on the fact that water and the oil do not mix, which makes it possible the process planographic to function. In the context of a printing plate, a wettable surface (the non-image area) may also be termed hydrophilic and (the image area) a non-wettable surface hydrophobic. Engraving is a process in which small cells or holes are engraved with the etching in a copper cylinder which is filled with ink. Flexography is a system of relief in which an increased image is created typical of a polymer base plate. In the gathering of stamp, the stamps rotatory-tighten-printed papers form are sometimes a different size that stamps printed with a flat dish. This occurs because the images of stamp are different separate on a rotatory printing press, which makes the various stamps larger (in general 1/2 millimeter with 1 millimeter).
Offset lithography uses a chemical process which an image is chemically applied to a plate (generally through exposure of photosensitive layers on the plate material). Lithography is based on the fact that water and the oil do not mix, which makes it possible the process planographic to function. In the context of a printing plate, a wettable surface (the non-image area) may also be termed hydrophilic and (the image area) a non-wettable surface hydrophobic. Engraving is a process in which small cells or holes are engraved with the etching in a copper cylinder which is filled with ink. Flexography is a system of relief in which an increased image is created typical of a polymer base plate. In the gathering of stamp, the stamps rotatory-tighten-printed papers form are sometimes a different size that stamps printed with a flat dish. This occurs because the images of stamp are different separate on a rotatory printing press, which makes the various stamps larger (in general 1/2 millimeter with 1 millimeter).
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