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Halftone

Halftone

The printed reproduction of any photograph or illustration as a set of tiny, evenly spaced spots of variable diameter that, when printed, visually blur together to appear as shades of gray. Many printers used in desktop publishing, notably laser printers and digital image setters, are able to print halftone images. In traditional method publishing, halftones are created by photographing an image through a mesh like screen; the darker the shade at a particular points in the image, the larger the spot in the resulting photograph. In desktop publishing, halftone spots are usually created electronically by the mapping of each gray level onto a collection of dots (called a spot) printed by the laser printer or image setter. Two main factors influence the quality of a halftone: the device resolution of printer and the screen frequency of the halftone. The higher the resolution of the printer, the smoother the resulting spots, and the greater the number of gray levels possible because each spot can be represented by a wider range of dots. The frequency of a halftone is number of spots used to represent gray levels in a given area.
 Printing Process

Pre-Press Production

Before the job can be printed, the document must be converted to film and "plates." Each of the primary colors -- black, cyan (blue), magenta (red), and yellow -- has a separate plate. Even though you see many, many colors in the finished product, only these four colors are used

The Inking Process

Ink and water do not mix -- this is the underlying principle of offset lithography. The ink is distributed to the plates through a series of rollers. On the press, the plates are dampened, first by water rollers, and then ink rollers. The rollers distribute the ink from the ink fountain onto the plates. The image area of the plate picks up ink from the ink rollers. The water rollers keep the ink off of the non-image areas of the plate. Each plate then transfers its image to a rubber blanket that in turn transfers the image to the paper. The plate itself does not actually touch the paper.

Registration

Color Registration is the alignment of the printing plates as they apply their respective color portion of the image that is being printed. If the plates do not line up perfectly, the image will appear out of focus and the color will be wrong.

Color Control

Color control is a process that involves the way in which the ink blends together, and is tied closely to the plate registration. The amount of ink that is released into the units depends on how much ink is needed to achieve a desired look. The ink is adjusted via the control panel that is part of the overall control console

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Services Provided
Service People  Custom Colors
 Secure Colors
 Color Matching
 Blanket Service & Repair
 Paper and Water Testing

In this Service, we provide custom color standards for Press Rooms, Packaging Industry, Corporate Managers and Art Directors and to any industry requiring color accuracy. We also provide products to specify corporate identity, product color and packaging standards, including color standards showing one or more custom colors on paper and on custom substrates, as well as the corresponding CMYK, HTML and RGB values.

This service is for those who feel very insecure about their packing. Regarding this we can provide you some colors which are very hard to copy and it helps to put a special effect in your packing making it very secure.

This service is for those who use to make their own shades in their own press rooms and are suffering from constant color variation. Just give us the printed specimen and get your shade quickly. This process is so precise that there is no color variation in repeat order.

Instead of blanket wash when kerosene oil when used to clean printing blankets causes a serious problem of glazing on the upper rubber surface of the blanket. Due to glazing the printing blanket looses it properties like dot sharpness and good ink transfer also sometimes it may cause scum problem in the printing. At printing channel we do full service of printing blanket by cleaning it and then deglazing it. In the last we seal all the edges to disallow the water to enter into the blanket from the open sides. If the compressible layer of the blanket is damaged we also get it repaired by decompressing it. This process is so good that it brings your blanket back to life.

Paper and water are very important parts of printing. If any of them in not up to mark then the printing results will not come up to the mark. No matter how good your machine is or how good ink you use. At printing channel we are having facilities to test the paper and water to be used in printing process. Get your paper and water checked to get best results.