How to set PS bleeding

Bleeding is a commonly used printing term. Bleeding in printing refers to patterns that increase the external dimensions of the product. Adding some pattern extensions at the cutting position is specifically used for each production process within its process tolerance to avoid after cutting The finished product has white edges or is cut to the content. When it is made, we will divide it into the design size and the finished size. The design size is always larger than the finished size. The larger edge is cut off after printing, and this is printed. And the cut out part is called bleeding or bleeding.

The standard size of the bleeding position is usually 3mm, which is the side that increases by 3mm along the actual size. This side is most ideal according to the natural expansion of the color within the size. Note that bleeding is sometimes not necessarily 3MM. 3MM is a commonly used printing standard bleeding position. Different processes have different requirements. For example, the folding pages I make for customers are usually only 2mm, and the newspaper only needs to add corner lines.

Graphic design bleeding means that all colored areas around the paper must be expanded by 3 mm. Take Dadu 16K as an example, the finished product size is 210 X 285 MM, the production draft should be made into 216 X 291MM, if it is just made to the finished product size, white edges may appear when cutting the steel knife, so bleeding is required during production , The printing house will automatically receive 3MM inwards when cutting the steel knife to the finished product. In order to prevent white borders, the image size should be 21.6x29.1.

First, the font problem

â‘ Some font library description methods are different, and the overlapped parts of the strokes will appear through the output, be careful!

②Paragraphs containing Chinese and English special characters are prone to problems, such as "■, @, ★, ○", etc.

â‘¢Use the new standard GBK font library to solve the problem of missing remote characters.

â‘£For fonts with too fine strokes, it is better not to use more than 3 colors of aliasing, such as (C10 M30 Y80), etc. Similarly, it is not suitable for reverse white characters on dark backgrounds. In the unavoidable situation, it is necessary to tick the reversed white words, and the approximate background color or a printed monochrome (usually black K) is applicable.

Second, the problem of gradual change

① The common problem is this: such as the gradient of red → black, the setting is wrong: (M100 → K100) it will be ugly in the middle!

The correct setting should be like this: (M100 → M100 K100) After careful analysis, you will understand, other situations can be deduced by analogy.

â‘¡Transparent gradation is a method suitable for network graphics, and grayscale images are also acceptable, but the final output is not possible, because its spatial mixing mode is RGB, and the screen mixing color is too different from the printed CMYK, so pay attention.

â‘¢ The gradient of the black part should not be too low, such as 5% black, due to the black overprint option when outputting, the replacement of black below 10% is usually used instead of overprinting, which causes problems. Similarly, the use of pure light black Be careful.

Third, the picture problem

â‘  One thing to note about the psd file is that you should not do any "destructive operations" after importing it, such as: rotation, mirroring, tilting, etc. Due to its transparent mask, a broken image will be generated after output.

â‘¡It's still a mask. Be careful when using coreldraw. If necessary, it is better to take the "put in a container" method.

â‘¢ Resolution and resampling

Don't do this in corel, "convert to bitmap" is indeed convenient, but the loss is color reproduction, it needs to be professional, and do it in ps.

â‘£ Color mode, don't blame me for being wordy, this is something that even the veteran has done wrong.

All pictures must be cmyk or grayscale and monochrome bitmap, otherwise they cannot be output.

Four, output accessories

That is to say, the accessories such as corner lines and color marks are attached. Now it seems that the output company services are very good, don't worry too much.

Special Note: The size of the A5 printing house is 142 * 210 mm

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