Requirements for spray painting and portraits of outdoor advertisements

time :2026-05-07 author : from: scanning :

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1. Size:

The size of the inkjet image is the same as the actual required picture size, unlike printing, there is no need to leave the bleeding part. In inkjet painting companies generally leave a blank edge after the output of the picture, which is generally left with the edge of the net picture 10CM. As shown in the picture, you can agree with the inkjet output company on how many edges to use for buttonholes. The price is calculated per square meter, so the picture size is in centimeters.

2. Image resolution requirements:

The inkjet image is often very large, and the inkjet image is the same. If the large picture still uses the printing resolution, it will kill the computer. However, there are no standard requirements for inkjet image resolution. The following is the resolution I use when using different sizes, which can be referred to:

Image area (sqm) 180m / m / m

Resolution (dpi) 11.25 22.5 45

Description: because the current inkjet printer mostly to 11.25DPI, 22.5DPI, 45DPI for the output of the image requirements, so the rational use of image resolution can speed up the speed of drawing.

Photo generally requires 72DPI/ inches on it, if the image is too large (such as the new PHOTOSHOP image shows the actual size when the file size is more than 400m), you can appropriately reduce the resolution, control within 400m size.

3. Image mode requirements:

Spray painting uniformly uses CMKY mode, and forbids the use of RGB mode. Today's inkjet machines are all four-color inkjet painting, its color is completely different from the printing color, of course, in accordance with the printing standards, inkjet companies will adjust the screen color and sample close.

Portraits can be done in either CMKY mode or RGB mode. Note that the value of scarlet in RGB is defined by CMKY, that is, Milling 100 Yellow100.

4. The black part of the image requires:

Inkjet painting and photo images are strictly forbidden to have a single black value, must be filled with C, M, Y colors to form a mixed black. If it is big black, it can be made into: Che 50 mm 50 Ye 50 Kun 100. Especially when using it in PHOTOSHOP, pay attention to changing the black part to four-color black, otherwise the black part will appear on the screen with a crosstrack, affecting the overall effect.

5. Image storage requirements:

Inkjet and photographic images are best saved in TIF format, but be careful not to use compressed formats