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terms

types and methods of printing

Letterpress printing
Method of printing, in which image transfer to the printed material is carried out from the printing form, where print member is situated above the spacing.
Photogravure printing
Photogravure printing is a method of printing, with using of printing form, where print members are deepened in relation to the spacing.
Non four color printing
1`-3 color printing. As a rule, it is used for producing blanks, leaflets, business cards, etc.
Jet printing
Jet printing means printing without contact with the material, when image is applied to the printed material by means of splashing special printing inks from nozzles with a small diameter.
Pad printing
Pad printing is printing with using resilient elastic pad for transfer of image from the printing form to the printed surface, as a rule, uneven surface.
Screen printing (same as silk screening)
Methods of printing, when printing ink is extruded through the holes in a special footprint by means of moving squeegee, dispersing the printing ink on the surface.
Thermal printing
In this process, in order to apply the printing ink on the paper, principle of xerography is used (adhesion of dry particles of the printing ink to the electro statically charged areas of material) followed with thermal treatment in order to fasten the image. The obtained image is noticeably embossed.
Flexographic printing
It is a sort of letterpress printing with the use of flexible photopolymer printing forms. Flexographic printing allows making four-color process on polymeric films, thick cardboard, including corrugated board.
Digital printing
This method allows unloading information from computer directly to the plating material or to print. This method maintains all strong properties of traditional offset printing-true color reproduction, flexibility of formats and other.
Offset printing
It is a method, in which colored image is transferred from the flat printing form to the intermediate rubberized surface according to the principle of wettability / non wettability, and then to the paper.
Offset printing technology
At the heart of reproducing image by offset method is technology of reproducing images on absorbing materials by means of mechanical transfer of liquid dye. At the stage of computer processing, the image is divided to the composite colors (usually it is yellow, blue, purple and black), to each of which corresponds its own component. After this, the image is registered (is replaced with a set of dots, the size of which corresponds to the brightness of color of original image). Further, the image is transferred to the phototypesetter, which out types four films for each color. Before printing these films are exposed by ultraviolet radiation to the printing form – plate coated with a special composition. After special treatment, printing ink sticks to the places which were not exposed, and the printing ink is transferred to the paper. Color printing press usually has not lesser than four sections – one per each color of printing ink. When the paper is passed through these sections, printing ink is applied to it in turn thus forming colored image.