Know FM (frequency modulation) outlets
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This FM is not the AM, FM of the radio, but the principle is similar. In the past, if you want to copy a continuously adjusted photo or picture, you must first convert it to a halftone mesh with neat and different sizes. This method is easy to produce when printing finer patterns. The phenomenon of "wrong net" or "net flower" cannot achieve the quality it deserves. After the digital device is imported into the prepress job, there is a new way of generating the dot, which is the FM (frequency modulation) site.
The principle and characteristics of FM (frequency modulation) network points are not intended to be repeated here. But if you really have to use FM points to represent images one day, how do you start your homework? What are the problems and concerns? Can the current equipment be applied? Can the current equipment be applied? I believe this is what everyone cares about. Foreign countries have quite a complete test and experience in this aspect, especially after the list is listed for your reference:
FM site benefits
(1) The image has better resolution & sharpness.
(2) The color of the picture is brighter and more saturated, and it has the effect and quality of the photo.
(3) There are no moires and rosettes.
(4) There is no problem with the dot angle, and the color registration operation is more simplified.
(5) Better tone reproduction, and the midtones have no problem with the concentration of the dots due to the convergence of the dots.
(6) Greatly improve the output quality of laser printers.
(7) Even newspapers or recycled paper can perform good picture quality.
(8) Color printing or metallic overprinting of four colors or more is most suitable for use, because of the worry of the wrong network.
(9) The performance of the FM dot at the edge of the color-coded text is much better than that of the traditional dot, and it can be considered to replace the way of expressing the text with a special color.
Disadvantages of FM outlets
(1) At the beginning of the application, since the color control has no experience, all the meshes need to be proofed by the machine before the color expression can be confirmed. If it is out of date, it is necessary to go back and correct the color separation curve. It is time consuming to process and adds a lot of cost.
(2) The existing various chemical or transfer proofing methods are not fully applicable to FM outlets.
(3) The film cannot be chemically trimmed because it is extremely easy to lose fine dots.
(4) Due to the irregular arrangement of the FM dots, there is a roughening feeling in the light portion of the picture.
(5) At low resolution output, the edges of the text or pattern will appear less sharp and jagged.. Therefore, the recommended resolution should not be less than 1000pixel/cm (2540pixel/inch).
(6) When the picture is aligned, it is more difficult than the picture of the traditional dot, and the cross line is needed to supplement the collage.
(7) The work of the printing plate, the transparent film base, the exposure time, the suction standard, the uniformity of the light source are extremely required, and the operation cost is high.
Prints suitable for FM (frequency modulation) dot performance
(1) The company's refined annual report.
(2) Jewelry catalogue.
(3) Medical journals and pictures.
(4) Photography.
(5) stamp.
(6) Textiles or leather goods with fine textures must be faithfully expressed.
(7) Prints, bronzes or oil paintings that need to be reproduced in detail.
(8) More than four colors of Hi-Fi Color, there are patterns of concerns.
Suggest
(1) The real benefits of FM sites are only valuable in certain areas of fine demand. Good results, through a lot of different tests, in order to find out the way and data, is not easy to get. Manufacturers should be prepared and aware.
(2) If the factory already has a complete set of color and quality management data (traditional outlets), it is not advisable to switch to an FM site for formal operation without careful calibration and confirmation.
(3) FM (FM) outlets for computer-to-plate (Compurter to Plate) and computer direct on-board (Compurter to Press In terms of GTO-DI technology, it is a perfect match because of the extremely low loss of dot transfer.
(4) FM network technology, at this stage, it should be a traditional auxiliary point of the traditional network and high-line network to compensate for the possible shortcomings, but not to completely replace it, otherwise there will be high cost Not necessarily popular.
(5) The printed products of the FM outlets are visually different from the general coated papers. Whether the customer is willing to accept it at a higher price is still a question, the manufacturer must understand this.