New eDossier: The angles of AM screens
The angles of amplitude modulated screens (AM screens) is quite a current printing problem. Even so it hardly attracts the interest of experts and the solutions available are anything but satisfactory. However potential future developments could make this issue a major focus of concern.
Most graphic printing methods use halftone printing. Gravure printing is an exception, but this process also runs in a semi-autotypical way today (variable depth gravure cells) and therefore is also the object of the following technical conditions.
Halftone printing processes only consist of two inking conditions: Inking of the image elements or non-inking (on/off; yes/no; binary) of the background. For the generation of halftones for the reproduction of printed images screening technologies are used. Comparable to the electronic image which is captured in pixels, the printing areas are split into small sub-areas, each provided with a degree of ink coverage according to the respective tonal value. This means: the lower the tonal value, the thinner the ink coverage.
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