What is a compensatory lithography?

Offset lithography is a print technique that is widely used worldwide. Most books, newspapers and magazines are printed using offset lithography, and this printing technique is widely considered to be a working horse of the press because it is fast, efficient, cheap and relatively easy. The "Offset" in the name indicates that the ink is transferred to a separate surface before use on paper. If the picture is in black and white, only one plate is required, as the board can simply be inksy ink ink. Color images are produced using a four -color separation process in which four different inks for inks of azure, purple, yellow and key (black) are produced; When the boards are printed, the colors are mixed visually together and create a color image. They are made by creating a film negative image, placing on a plate sensitive in the photo, exposure and then developing it. Once the board is made, it can be mounted in the print and the real entertainment begins.

This printing technique uses the fact that oil and water do not mix. The plate is brushed by a cylinder coated with water and then the rollers covered with ink. The ink is attracted by the parts of the plate that have been exposed earlier, while the water maintains non -existent portions clean so that they do not move or transmit ink. Then the board transmits the ink to the rubber cylinder known as the "blanket" and the blanket rolls over the paper; Usually the paper is powered between the blanket and another cylinder to ensure that the image remains fresh.

offset press can run continuously, which is very fast. Depending on the work, the printing of Be Feed E can, which means that the pieces are pulled from the magazine by printing and passing or powered on the web, in which case the paper is on huge cylinders. In both cases, the paper is usually passed by the oven so that it dries quickly, prevents paint and then can be cut, bound, foldedand ready for distribution.

The first print for offset lithography was developed in 1903 and the concept quickly caught up in the press community. Offset presses differ in size from massive presses used by commercial publishers, which can be larger than the house, to smaller models around the size of folders used in smaller printing companies.