Wednesday 23 April 2014

Taking A Look At Printing Press Kits

By Eloise Hewitt


The printing press is a mechanical method of reproducing text and images on paper or similar materials, which involves applying ink, usually oil on metal pieces to transfer it to paper by pressure. Although, it began as a traditional method, it ended being a significant technological revolution. The concept is broader because it represents the evolution of various technologies. These include flexography, screen print jobs, gravure, high etching, electrolytic photography, photolithography, printing press kits, lithography, offset print, xerography and current digital methods.

Until the early nineteenth century, the pressure exerted by the plate beyond a certain size was not sufficient for a correct impression. For a long time, the presses remained the same in principle, receiving only small minor practical changes. Diecutters hand - the lever actuates the movement of an inking roller, the ink will be plated on a disk at the top of a vertical pass print form, then the platen carrying the paper sheet is applied.

Presumably in the form of a sliding carriage, thus avoiding having to face too high for inking the plate and marger (placing the sheet of paper). Workers filed ink that was applied on the print form with two leather balls stuffed with horsehair and fitted with wooden handles. According to tradition, the bullets were dog skin, giving it a very fine leather and free of pores.

The ink is also a major element of the invention of typography: they had to find ink that adhered to the metal and on paper without dripping or drooling. Instead of using the usual wooden tablets, which were worn with use, they drew up each of the letters in wooden molds and later filled the molds with lead, creating the first movable type.

New systems and structures never completely erased the earlier developments, but they simply overlapped. Thus, new techniques of information storage and retrieval have caused the print media to regroup and find new placements, often more specialized.

The machines consist mainly of small metal blocks carved with letters, symbols, and also spacebar organized into plates. This plate (matrix) with all necessary implements for forming characters would be taken to a machine called the press, which would put pressure on the matrix against several sheets of paper thus generating a sequence of pages that would be stored for use.

From a traditional composition, a blank is a kind of mold, it is cast from which lead is handled, so it has a composition of an entire page in a single block, which can be bent to fit a cylinder. The reciprocating motion of heavy form is replaced by a rotary motion (hence the name). Continuous, smooth and fast print speed is performed on a paper roll (cut in output release). All newspaper printers adopted the rotary.

The movable type was invented by the German Johannes Gutenberg in 1439, based on screw presses. He was a goldsmith by profession but went on to developed a complete printing system which perfected the process at all stages, adapting existing inventions with his own technology.The innovative matrix (typography) led to the rapid creation of large quantities of pages, a key element in the profitability of printing presses worldwide.




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