On the printing process, several factors affect dot gain – dot gain, print – Printing Industry
In the printing process, generally to network as the basic units. As the network itself is small, after screening, proofing to printing on paper, dot is always in flux. Cause the whole picture changes color and affect print quality, the main changes in the performance of the network increases. Network increases, including increases and physical optics increases.
Print Network HC In the printing process, generally to network as the basic unit. As the network itself is small, after screening, proofing to printing on paper, dot is always in flux. Cause the whole screen changes color and affect print quality and performance of its major change for the network increases. Network increases, including increases and physical optics increases. As the light increased the optical reflection and diffuse, resulting into the formation of the human eye to reach the visual area of the retina than the actual area network. Physical increase including printing pressure, the lack of exposure and proofing paper, the characteristics of ink caused by the ink absorption, diffusion and the resulting dot gain. Physical increase is the main form of network increases, the change can be reduced printing conditions. Specifically talk about the impact of the following locations
Several factors increase 1, the printing conditions on the impact of increased network
Outlets in the area of the printing process according to printing conditions will produce different changes in the increase. In the case of normal printing conditions, in order to maintain an appropriate contrast images must have enough ink and appropriate pressure, so the normal dot gain is inevitable. However, too much ink and pressure exerted by the network will increase too much, resulting in images made of waste hierarchy and class.
2, the ink film thickness on the impact of increased network
Ink from the print edition delivered to the network Blanket And then transferred to the paper, the ink layer as a certain thickness, but also soft body, compression of the network is bound to increase. The increase is, according to the amount of ink varies, so must be strictly controlled to the ink. If the ink used in printing too much or too little, half-tone dots may be filled ink dot gain was very full, or fully "exposed." If the ink-water balance disorders, the same phenomenon will occur. As the ink sticky, but moist, will be a lot of ink to the paper may produce wrinkle analysis, stick ink film may also cause all kinds of trouble. Therefore, image processing software such as Photoshop, have the background to remove the gray component replacement GUR UCR and the function of a variety of ink colors can be deleted, and the overall percentage of ink can be reduced to a reasonable value (usually 240 between% and 360%), the specific value depends on the type of printer, paper status.
3, the printing pressure and process conditions on the impact of increased network
In general, the greater the pressure printing, dot gain more serious. Offset When the imprinting, so that Blanket Deformation to some extent will cause dot gain. Appear on the same printing problem will affect the image of any hue value. For example: If the offset printing is too loose, often produce dot double (DotDoubling), increased network looks like a serious problem, or too many scratches on paper and paper relative to the impression cylinder has a small slide, usually caused network fuzzy (DotSlur) problem. This network will increase the printing press printability, printing type and status, different ink brands. Thus, according to the different printing conditions to repair the state-level curve, the performance level of print quality will be helpful. Usually based on the printing of the network increases, the lower middle right, pre-press production will be enhanced printability.
4, paper the impact of conditions on the network increases
In the ink transfer to the substrates, due to absorbent paper, ink spread to the surrounding when the penetration is one of the reasons for the increased production network. Therefore, the nature of the printing should be changed according to the paper and ink viscosity and ink volume. Coated paper (coated) surface has good gloss, whiteness and light reflectivity, has a good Printability: ink printed on coated paper on the proliferation of small, dot point type well, dot gain can be controlled in 15%, to better reflect the level and contrast, and therefore as a senior at the time of printing paper for printing pictures printed sample. In addition, pre-press operations, generally carried out with the coated color proofing, prepress image quality test.
I am a professional editor from Hardware Wholesale,
and my work is to promote a free online trade platform.
http://www.hardware-wholesale.com/ contain a great deal of information about
rs232 422 converter , gasoline powered generator
welcome to visit!
Processing your request, Please wait....
