Flat output (printing) notes (on)

To faithfully reproduce your ideas on paper, besides the exquisite design, it is even more critical to have a standard and unmistakable output as a guarantee. Therefore, it is important for computer designers to understand the importance of output. . PhotoShop is currently the most widely used image processing software. If you want to have a good output, the premise is to find the best manuscript; use the best roller scanner; DPI is set to 2 times the printing cable, before making four-color manuscripts It is necessary to convert the graphics to CMYK mode. If it exceeds 10 MB, use the EPS format and save it in color. Do not use compression or other formats. After editing the picture, you need to modify the picture without modifying it. Channel removed. If there are multiple Layers, all the useful Layers must be merged, and the unused Layers can be saved. After the layout is finished, if the picture has been modified or renamed, the picture must be relocated or connected. Freehand is a widely used typesetting software. To achieve a good gradient effect, you must set a high resolution on the page before production. It is also recommended to use PhotoShop or Illustrator to make gradients. Please use Fill and srtoke less to fill in the blank, so as not to affect the quality of the output. CorelDraw is the most typesetting software used by users on PCs. In order to get the best film or proofs in the shortest possible time, please don't use RGB color to fill the color blocks or lines in the production process; the number of nodes in the text is controlled within 1500 points after turning into a curve. Graphics files are used as little as possible in PSD format; spot colors are available in Pantone special colors, and Pantone printing colors are not available.

1. There are two main reasons why skipping occurs when you skip the word in the output: one is the position of the character that has not been readjusted after the font is replaced, and the other is that there is a space between the character and the word. The only way for the former case is to re-adjust the position of the word after the font is changed, and there are two ways to solve the latter: first, divide the word into two parts and place it in its original position; The solution is to use TrueType fonts. After defining the position of words and graphs, the word will be Outlined, but it should be noted that the spaces between the words must be English spaces, otherwise after the Outline, the empty position will appear ".

2. Bottom black and white maps saved as Grayscale TIFF images in PhotoShop, and then placed into Freehand to use a problem - if you select a black overprint if the Grayscale graph under the color or other base map, then it's white Part of the color or the corresponding part of the base map, this problem arises because Freehand Grayscale map placed in PhotoShop default fill color is K100, in the choice of black overprint, the white part is considered CMYK are zero, this Naturally reveals the color of its color version For this situation, there are two ways to solve: First, in the PhotoShop, the Grayscle into CMYK, in the Channel dialog CMYK total Channel selec all, copied to the Channel Black In addition, delete the images in the three channels of C, M, and Y; another method is to change the color of the Grayscale graphs to Y1 and K100 in Freehand so that there is no problem when selecting black overprints. Now.

3. The colors of the color monitor have a certain influence on the person's perception of the picture. Therefore, the Gamma software must be used to adjust the screen so as to approach the proofing, which is closer to the color itself when coloring the picture in PhotoShop later. Adjusting the color of the screen is best done directly by users who frequently use this machine. Do not rely on vendors and other replacements because the color perception of each user is different. In Freehand and other typesetting software, set the color to print color. If you want to use a dedicated color, you can use the Pantone color system, or set the color to the Spot type, which is a specific color. When a graph uses a dedicated color, the graph is best stored in the BitMap format because BitMap is not transparent. In typesetting, if you want to manually cut and align lines, you must set a four-color black color, that is, C100, M100, Y100, K100, in order to have each color version, and these lines must be set to Hairline, the finest line, to improve the accuracy of the version. Above the cutting line, if there is another spot color, these spot color lines must be made in-situ. Freehand and other typesetting software, in the setting of the color on the screen and the actual difference, so you can usually borrow a print color reference for reference, and then set the hue, use Freehand out of the newspaper draft, if it is a two-color printing plate, but there are Including monochrome black EPS images, the graph can not be saved as Grayscale mode, otherwise the output will be divided into four colors. Since there are only two versions, the hue of the graph will become lower. Therefore, Save the map as CMYK mode, copy the entire version of the content to the K version, and delete the contents of the CMY version separately so that the output is correct.

4. Output lamp (negative) There are generally three situations in which the output lamp (negative) is required.
(1) Request to enlarge the advertising light box;
(2) When the computer production was changed from RGB to CMYK, a certain color was found to be distorted, and the RGB output lamp should be separately divided;
(3) When the customer's lamp is accidentally damaged. Production requirements:
(1) The computer file must be RGB;
(2) Consolidation of Channels and Paths;
(3) Save as TIFF format;
(4) Manufactured according to the proportion of lamp specifications, such as 4"*5" 135 (240*320), etc.
(5) The unit of measurement for the production of the light chip is 2K, 4K, 8K 16K, 2K ie 1024*2 = 2048 pixel (pixels), 4K 1024*4 = 4096 pixels for the rest of the units, for example: 4K for 4"* 5" lamp, containing 4096 pixels in a 5" range, can also be expressed as 4096 pixel/5" = 800 dpi 4x5" light with a higher general picture scan and 4K output. For printing off posters, 2K's 135 can be enlarged by 8*10" photos.

5 pay attention to the output image mode
Bitmap - bitmap, PhotoShop bitmap mode is a black and white image, each pixel of the black and white image is represented by a bit of data, that is, the pixel display image is not black or white, so the image takes up the storage space The smallest. However, WINDOWS BMP is also a bitmap, but it takes up a lot of space. Grayscale - In grayscale mode, each pixel of an image is represented by 8 bits representing 256 gray scale representations (gray scales) between each black and white pixel. Grayscale images have no color. When converting a color image to grayscale, PhotoShop will display a warning message with reduced image information, prompting the user whether or not to actually abandon the color information. Indexed Color - The index color. In the RGB, CMYK, and Lab modes, each pixel on the screen contains complete color information, but the image also occupies more memory space. In the actual output, the colors used by an image are generally only tens or hundreds, so if the colors to be used create a color table, the color of each pixel on the screen is only one of the colors in the color table. Position, you can save the image of the corresponding storage space, use this method to record or display the image that is the index color mode. The RGB Color--RGB mode is the main image display and processing mode of PhotoShop. The RGB mode synthesizes most of the visible colors using the basic components of red (RED), blue (BLUE), and green (GREEN) colors. . The CMYK Color--CMYK mode is composed of four basic colors of CYAN, MAGENTA, YELLOW, and BLACK to synthesize various colors, which are generally used in the color separation processing field of printout. The Lab Color-Lab mode uses a luminance component L (lightness) and two components a and b to represent colors. The a component green color evolves to red, and the component blue changes to yellow.