Let me briefly introduce some simple requirements for making and outputting images in inkjet and photo shoot.
1. Size:
The size of the inkjet image is the same as the actual required screen size. It is different from printing, and there is no need to leave a bleeding part. In the inkjet company, there is generally a white border after outputting the picture. In general, it is left with the net edge of 10CM. As shown in the figure, you can agree with the inkjet output company, how many sides are left for buttonholes. The price is calculated per square meter, so the screen size is in centimeters.
2. Image resolution requirements:
The inkjet images are often very large, and so are the inkjet images. If the large screen still uses the printed resolution, then the computer will be exhausted. However, there is no standard requirement for the resolution of the inkjet image. The following is my personal resolution when using different sizes, you can refer to:
Image area (square meters) 180——infinite 30 --- 180 1——30
Resolution (dpi) 11.25 22.5 45
Note: Because most current inkjet printers use 11.25DPI, 22.5DPI, and 45DPI as the image requirements for output, reasonable use of image resolution can speed up the speed of drawing.
The general situation of the photo requires 72DPI / inch. If the image is too large (such as the file size exceeds 400M when the new image is displayed in PHOTOSHOP), the resolution can be appropriately reduced and controlled within 400M.
3. Image mode requirements:
CMKY mode is uniformly used for inkjet printing, and RGB mode is prohibited. The current inkjet printers are all four-color inkjets, and their colors are very different from the printing colors. Of course, when drawing, the printing standards will be followed. The inkjet company will adjust the color of the screen to be close to the sample.
The photo can use CMKY mode or RGB mode. Note that the value of red in RGB is defined by CMKY, that is, M = 100 Y = 100. [next]
4. The black part of the image requires:
It is strictly forbidden to have a single black value in the inkjet and photo images. It must be filled with C, M, and Y colors to form a mixed black. If it is big black, it can be made as follows: C = 50 M = 50 Y = 50 K = 100. Especially when using the effects brought by PHOTOSHOP, pay attention to changing the black part to four-color black, otherwise there will be horizontal lines on the black part of the screen, affecting the overall effect.
5. Image storage requirements:
It is best to save the inkjet and photo images in TIF format, but please note that the compressed format is not available.
The number of points depends on the situation. Inkjet printing is generally 30dpi and photo printing is generally 72dpi. If the picture is large, it can be reduced accordingly. The smallest dot I have done is 10dpi, 300 square. No matter how big it is, you can make it in several paragraphs. The photo is generally not less than 50dpi. Regarding the small number of dots, the picture will not be blurred, but will produce strong aliasing. Conversely, if you increase the number of dots and enlarge the picture, it will become blurred, and the aliasing is less obvious. If you do it in general, you can do it in two ways and think for yourself.
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