Requirements for spray painting and photo image ou

2022-08-12
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Advertising production: requirements for spray painting and photo image output

spray painting generally refers to the output of outdoor advertising pictures, which output a large picture. For example, many billboards near the highway are the output of the spray painting machine. Output models include NRU salsa 3200, Caishen 3200, etc., which are generally 3.2 meters wide. The medium used by the inkjet printer is generally advertising cloth (commonly known as light box cloth), and the ink uses oily ink. In order to ensure the durability of the picture, the color of the picture is generally darker than the color on the display. Its actual output image resolution generally only needs 30-45dpi (device resolution). The actual size of the picture is relatively large, with an area of hundreds of square meters

photo generally refers to indoor use, and its output image is generally only a few square meters in size. Such as the small advertising screen used by the manufacturer in the exhibition. Output models, such as HP5000, are generally 1.5 meters wide, and the media used by the photo machine are generally PP paper and lamp, and the ink uses water-based ink. After the output image is finished, it needs to be coated and mounted. The output resolution can reach 300-1200dpi (different models will vary), and its color is relatively saturated and clear

now let's briefly introduce some simple requirements for making and outputting images in inkjet and photo

1. Size

the size of the inkjet image is the same as the actual required picture size. Unlike printing, it does not need to leave a "bleeding" part. Inkjet companies usually leave "white edges" when outputting pictures (generally 10cm). You can make an agreement with the inkjet output company on how many centimeters of edge to leave for "buttonhole". The price is calculated per square meter, so the picture size is in centimeters

there is no need for "bleeding" in the photo output image, just make the image according to the actual size

2. Image resolution requirements

the painted image is often large. We should understand the truth that "we don't know the true face of Mount Lushan, but only because we are in this mountain". If the large picture still uses the resolution of printing, it will kill the computer. In fact, there is no dead standard for the resolution of inkjet images. The following is the resolution I use when making inkjet images of different sizes for reference only (image area is square meters):

more than 180 square meters (resolution dpi:11.254. Database: data is saved to the database), 30-180 square meters (resolution dpi:22.5), 1-30 square meters (resolution dpi:45)

note: because most inkjet machines now use 11.25dpi 22.5dpi and 45dpi are output resolutions, so reasonable use of image resolution can speed up the drawing speed

the photo resolution is generally 72dpi. If the image is too large (for example, when the actual size of the new image is displayed in Photoshop, the file size exceeds 400m), the resolution can be appropriately reduced and the file can be controlled within 400m

3. The function and working principle of the reducer of the spring tension tester. The image mode requires that the cmky mode be used uniformly for painting, and the RGB mode is prohibited. The current inkjet machines are all four-color inkjet. When making drawings, we should follow the printing standard. The inkjet company will adjust the picture color to be close to the sample

for photo, you can use either cmky mode or Rg1 Manual clamping is mainly used in mode B on single arm and double arm models. Note that the value of bright red in RGB is defined by cmky, that is, m=100 y=100

4. Requirements for the black part of the image

it is strictly forbidden to have a single black value in the spray painting and photo image. C, m, y colors must be added to form a mixed black. If it is big black, it can be made into: c=50 m=50 y=50 k=100. Especially when using its effect in Photoshop, pay attention to changing the black part to four-color black, otherwise there will be horizontal lines in the black part on the screen, which will affect the overall effect

5. Image storage requirements

it is best to store spray painted and realistic images in TIF format. Note that the format of compression is not available since it started early in foreign countries

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