Technical information

Printing Techniques 

They get their name by printing techniques mold is pressed. The most commonly used printing techniques; High pressure (typography), a flat printing (offset) printing Pit (gravure) and Screen printing (screen) d.

1) High Printing (Typography): High pressure in the system, making pressure on the mold surface of the paper, printing the "empty" sections rates are higher. In the high pressure system, which can be used as a template in hand typesetting machine typesetting, zinc plates and photopolymer printing plates and due to the difference in height between the engaged portions of the system to "high pressure system" was named.
Indirect letterpress printing (Letterset)
This system for the metal or photopolymer plates used in mold Letterset pressure system "high pressure" must accept the system. In this system, the plate rubber, rubber, paper, printing is performed.
When microscopically enlarged, the sharp edge of some letters and found that black, but gradually weakened towards the middle. This image is not available in the trade points. Points, more than offset the sharp, clear and smooth tones, although many are not exactly black and uniform ground pressure by offset.
Flexographic printing (aniline or rubber Edition)
Rubber or Cyrel flexographic printing, printing is done with photopolymer flexo plates as APR.
The difference between darkness point edge as flexographic and letterpress printing center. In fact, this difference is used for flexographic liquid ink from the letterpress printing is more pronounced in some cases.
The rotary flexo printing machines are able to print on paper or plastic foils coil. Is used only rubber mold until recently this pressure "Tyre pressure" is also called.
Flexo printing machine makers rotating roller in the paint chamber in the paint, screening gives the roller screening roller transfers the pattern wins. Mold boiler, boiler pressure makes contact with paper or foil printing by intervening.
2) Lithography (Offset): works on the basis of pushing water ink. The image is taken from the original film, transferred to the light-sensitive offset plates, molds prepared. The press in the press section to the mold surface and the same height, this printing system "Lithography" is called. 3 wins in straight printing presses are available: Mold wins, Rubber Boiler, Pressure Boiler.
Flat mold shapes the boiler pressure, the boiler passes rubber and paper to be printed, receives print passes between the impression cylinders with the blankets.
In flat printing, forsa paper trail behind can not be seen. All areas of the offset point is the same darkness. Point serrated edges are a bit weak and light.
Light print (gelatin print)
Light printing, such as offset printing system Although there is a flat screen dot because of the lack of both offset and other printing system differs from both. When gulp open tone seen small droplets of paint, but knows not seen the sense of trade point. Light print samples can be more likened to a photo. Gelatin containing paint particles on the graininess of 500 cubic meter is a tram delicacy. Original taken to the nearest print quality light pressure. But writing in this printing system and the line will not be printed.
3) Engraving (gravure): The hole pattern to be printed on the contrary the Supreme raid. Paint (Ink) fills the hole. Excess paint is scraped with squeegee and printing is done.
Painting images of various rotogravure printing system is different. The common feature of all press articles are serrated. The main reason for this is that they have to use the train articles. The tram used only for gravure cylinder articles cylinders are engraved by hand. The reason for the requirement to use a train for articles, by keeping the lines of the painted border around the pit, which constitutes the point is that prevention of the flow of paint.
Classic rotogravure
The depth of the pit is the same diameter but with different gravure printing system. If this system is inspected midtones and light tones gulp typical square of the same size dots are visible. Ton of all points having the same size, depth varies according to the amount of dye due to difference.
In dark tones, the intense amount of paint printed on paper (multi-color work) has closed the border line of the pit, detail is lost. Saturation of the picture tone values ​​obtained in three colors Classic rotogravure, printing system, but 4 may be obtained in other colors.
Electronic cylinder engraving machine with the points given by the pressure of the cylinder is especially prepared in the form of an ellipse in the midtones and light tones. Point edge is not very clear. These symptoms indicate that prepared the cylinder engraving machine.
Halftone half of rotogravure
The diameter of the hole in the printing system is variable in depth. Halftone half tons of rotogravure open the "needle tip" means the dots are round. The square is in the midtones. But the corners are slightly rounded square.
Halftone Intaglio
The depth of the pit is the same but this printing system-wide variables. Classical and semi Halftone is not used as often as gravure. Clear and not very successful edition of the dark tones. Mostly applied on top of the foil packaging printing.
4) Screen Printing (screen): This system is used to screen the reason for printing be known as synthetic or silk cloth printing plates. The cloth has a thin thread between holes. Paint on the top sieve with a rubber squeegee peeled off when pressed, it makes printing paper passes and bottom of the hole.
Screen printing firstly stretched over a frame sieve. The front and rear sides of a special solution is applied. After drying, screen the positive film is placed under vacuum and imaged. Exposed regions, hard, soft parts are not exposed. It is then separated from the bath by making the screen surface with pressurized water. So pressing, that would be depleted field must pass through the paint. On screen, adjustments are made if necessary. After passing through the curing bath or a special lacquer to mold print-ready status becomes closed.
Screen printing, draws attention to a thick layer of paint. Other printing systems ink layer with an average of 3 microns thickness in screen printing 20 - is 30 microns thick. Serigraph with cardboard outside the paper, glass, wood, materials such as fiberglass, as well as almost every kind of material 3D printing can be done.