What are the similarities and differences between a photo machine and an inkjet printer?

Portrait machines generally refer to indoor printing (at present, most piezoelectric photo machines can also print outdoor advertisements), and inkjet machines refer to printing outdoor advertisements, high-speed billboards and so on. Compared with the two, the accuracy of inkjet printing output is lower, and the printing resolution of photo machine is more exquisite. The picture output by photos is generally only a few square meters in size. For example, small advertising pictures used by manufacturers at exhibitions. The media used by the photo machine are generally PP paper and lamps, and the ink is water-based ink or oily ink. After the output image is completed, it needs to be coated and mounted. The output resolution can reach 300- 1440 dpi (different models will have differences), and its color saturation is clear. The difference between them is as follows: 1, size: the size of the ink-jet image is the same as the actual picture size, which is different from printing and does not need to leave a bleeding part. In inkjet printing companies, there is a blank margin behind the output screen. The general screen margin is 10CM. As shown in the figure, you can negotiate with the inkjet output company how many edges to leave for buttonholes. The price is calculated in square meters, so the screen size is in centimeters.

2, image resolution requirements: inkjet images are often very large, to understand the truth of "I don't know the true face of Lushan Mountain". The same is true for inkjet images. If the big picture still uses the printing resolution, it will kill the computer. However, there is no standard requirement for the resolution and filtering of inkjet images. The following resolutions are used when I use different sizes for your reference:

Image area (m2) 180- infinity 30- 180 1-30 resolution (dpi) 1 1.25 22.5 45.

Note: Because most inkjet printers now use 1 1.25DPI, 22.5DPI,

The output image needs 45DPI, and reasonable use of image resolution can speed up drawing. Generally, it takes 720DPI/ inch to take pictures. If the image is too large (for example, the file size exceeds 400M when displaying the actual size of the new image in PHOTOSHOP), the resolution can be appropriately reduced and controlled within 400 m. ..

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 inkjet printers, and their colors are completely different from the printing colors. Of course, when drawing, the inkjet printer will follow the printing standard, and the inkjet printer will adjust the color of the picture to be close to the sample. Photos can be in CMKY mode or RGB mode. Note that the value of red in RGB is defined by CMKY, that is, M= 100.

Y= 100 .4. Requirements for the black part of the image: It is forbidden to have a single black value for inkjet and photo images, and three colors of C, M and Y must be added to form mixed black. If it is big black, it can be made: C=50.

M=50 Y=50

K= 100. Especially when you use it in PHOTOSHOP, you should pay attention to changing the black part to four-color black, otherwise a horizontal bar will appear in the black part of the screen, which will affect the overall effect.

Production requirements of inkjet printing: after the customer finalizes the manuscript, it must make necessary minor changes according to the production requirements, such as a 300CM piece.

-150CM storefront signs generally need to be modified to a certain size (deducted or added according to the outsourcing edge of the storefront) to prevent white edges or words from being wrapped outside and not being processed.

When making a picture, be careful that the text is not too close to the edge of the canvas, which is like bleeding when printing. Of course, there are also sizes that are deducted and increased. Whether to deduct or increase the size is generally explained by contacting the engineering department, because designers and typesetters generally do not measure the size of customers' advertisements, but reduce the size of pictures so that the edges do not cover the content.