Business, process, pre - press personnel should be rich in printing knowledge.

1. Be familiar with the technical parameters of printing equipment, such as the maximum and minimum size of the machine, and the folding mode of the folding machine...

2. It is clear what paper is used for printing. If it is to be in reverse version, it will be used on two sides of paper like coated paper and book paper. Two different paper, such as white paper, white paper, and so on can not be used for self-reverse.

3. Some techniques of typesetting: whether you can borrow the mouth, whether you can use the reverse version to make a version, whether it is the front or back version or the reverse version.

4. If the color paper of the mounting hole should be paid attention to the left and right sides, there should be a minimum of 8mm bleeding in the mouth and tail. If the paper is tight, the sticky position of the color box can leave no bleeding position. In particular, it is important to note that the hole paper is 3mm shorter than the length of the colored paper, which we call the pit.

5. The paper and color box should be crossed, otherwise it will be easily deformed. Paper box printing also should pay attention to white paper white, stiffness and paper grain direction.

6. For precise products, such as hot stamping with a set position, and the color limit of the beer, the layout should be as small as possible, the paper is not easy to deform, and the post-processing is convenient.

7. Large ink position, the high position of the overprinter should be placed in the mouth position as far as possible, and the color of the end of the plate is too dark to be easily set.

8. If it is the product of the upper automatic beer machine, it should be kept as large as possible, so as to facilitate the mounting of the laminating machine, so as to guarantee the smoothness of the mouthpiece and not affect the beer position.

9. When composing, pay attention to the requirement of the paper grain, especially the plastic card that is easy to deform, and it is generally used for mounting CARDS, chessboard and fine boxes, etc.

10. For the products that are mounted, the paper should be considered in a comprehensive way, whether it is a waste of paper or a waste of paper, because some paper seals are not exactly right, which should be seen as a waste.

11. On the third floor, the paper and the base paper should be 3mm-5mm lower than the surface, so that the paper can be mounted on paper, and the paper should be more accurate, otherwise it will be easily adhered to.

12. The card imposition should be considered whether it is a single card or double or double. This is important for post-processing.

13. If you use a rounded corner machine to circle the card, you can consider a single blade. If you use the corner machine to squeeze the corner, you can't make a single blade, and the minimum is 6mm in the middle.

14. Gold (silver) card paper do not use water - based coating, the water - based coating will cause the product to be dark and dull.

15. The gold (silver) field shall be printed on the multicolor machine to prevent gold (silver) from being scratched, and the loss of any word to be printed, including black characters. Gold (silver) design, words cannot be printed on the field after the ink color, to make the ink color after the field to make a leak trap.

16. There are number products, should pay attention to the length and location of the number, and put them in the last process.

17. In the general assembly, the same diagram should be made up and down so as to be consistent in printing.

18. White ink is used in the spot color, which is to be printed in front to prevent the color of white ink from covering the front.

19. When making die cutting, pay attention to the requirements of line (dotted line, mark line, point and mark), such as the spacing of the dotted line and the width of the line.

20. The muzzle of the box and box is usually placed on a large surface.

21. Wine labels and cans should also pay attention to the grain direction of the paper. Different manufacturers and different batch Numbers have different directions to prevent curling and sticky.

22. After coating or glazing, ink color will also be changed.

23. With a silver background, the product can be coated with metallic luster, such as yellow and yellow.

24. When reviewing and reviewing the samples, we must draw the finished product structure, such as drawing out the mold tangents of the boxes and boxes for inspection.

25. The effect of correct typesetting on die-cutting processing.

When the die cutting machine is used in the die cutting machine, the edge of the paper box is often not smooth, which will affect the product's appearance more or less.

Is the main reason of the effect the beauty of the product in the flat pressing automatic die cutting machine for die cutting process need to be by diao mouth knife cracked a few small mouth, can smoothly from finished products after die cutting machine, broken small mouth embodies in the box after die cutting edge is not smooth.

The solution is in the imposition of the paper box as far as possible in the paper box in the mouth edge. After the clever imposition, the appearance of the paper box after grinding and processing will be very beautiful. (we don't have the automatic die-cutting, but we can understand)

The printing plant for more than two products, in the imposition of the general use of two methods. If the pattern between two spell can do seamless connection, should try to use one size fits all postpress way, don't leave a gap in the middle, because of adopting the one-size-fits-all approach can save paper, also can save the production application of die cutter, but also after the die cutting waste, works. But if there is a pattern between the two pieces, there is no seamless connection. Or is limited by the shape of the two products, can't do it one size fits all, then between the two products in general to set aside at least 4 mm wide row of cutter location, and the design of each product at least 2 mm bleed.

If the product of laminating is allowed, the mouth position should be increased as far as possible to prevent the mounting of the adhesive when it is exposed to the cutting.

Therefore, the printing plant is flexible and clever, can save the cost, and can avoid the impact of the imposition of the die cutting process.

26. Offset printing gold (silver) ink notes.

The ink layer of offset printing is thinner. In the printing of gold field and coarse lines, two consecutive printing or two-step printing process is used, with the saturation of semi-strong ink layer and metallic luster effect. Silver ink printing eligibility is better than gold ink, a single printing can basically meet the requirements of general packaging printing, if you need large area printing paper used by silver or poor, will be expected to take two printing way, with a good show a silver luster. When printing gold (silver) ink on an offset press, the following items should be noted.

(1) the base printing gold (silver) ink, offset printing gold ink, generally to color printing (commonly known as base), namely choose strong hiding power, approximate colour and lustre and gold (silver) ink printing ink as a background, and then on the base of color ink layer printing gold (silver) ink, can not only save the gold (silver) ink, and can improve the gold (silver) ink film gloss, strengthen the gold (silver) ink printing effect.

(2) on the base of color ink printing gold (silver) ink, the base of color is decided by the quality of printing gold (silver) ink printing quality, the important factors, therefore, color printing ink to level off, the layout of the base color ink of higher viscosity, dry wants moderate, ink layer thick. The drying method of the base color ink is suitable for the combination of osmotic drying and oxidation conjunctival drying. When printing gold (silver) ink, should be in the base of color ink layer is not completely dry to superimpose, otherwise easy to out of cash (silver) ink printing, or poor adhesion fastness, one rub off phenomenon.

(3) on the gold (silver) ink layer overprint other ink, gold besides itself has metallic luster, more is the main reflection effects of the surface light, if printed in gold ink layer top and other colors of ink, can affect gold ink layer metallic luster effect. In printing process should be considered in the design of this, make full use of gold ink high opacity, strong hiding power, reasonable arrangement of printing color sequence, as far as possible put gold ink on the final color series. If must be on the gold ink dieyin other color ink, graphic area should be less as far as possible, such both neither can affect the effect of gold ink, and can better prevent dieyin causing printing problems such as bad.

27. The four most common types of paper are:

(1) positive paper: 109.2 cm long and 78.7 cm wide.

(2) large scale paper: 119.4cm long and 88.9 cm wide.

(3) adhesive: 765 cm long and 535 cm wide.

(4) carbonless paper: specifications with positive and large dimensions.

28. Commonly used imposition methods can be divided into the following:

1. One-sided: this method refers to the printed matter that only needs to be printed, such as the poster, which only needs to be printed on the front, and the back side is not required to be printed.

2. Double-sided: commonly known as "underside", which means printed materials that need to be printed on both sides, such as small leaflets, small posters, CARDS, etc.

3, cross type: commonly known as "copy" and "flip", suitable for print magazines, books and periodicals, such as a magazine of 16 to open cover, a front cover, inside front cover, inside back cover, back cover, such as four pages to print, when the idea of the front cover and back cover, inside front cover, inside back cover transverse together, then the front cover and back cover, inside front cover and the inside back cover 'spell in a four pages to print, once one side printing, after the completion of transfer paper transverse 180 degrees, use reverse side to continue printing, is completed, will print cut from the middle, you can get two identical prints.

4. Flip: after printing on one side of the paper with the same printing plate, flip the paper back on the back, but use the other side of the paper as the "bite edge". This method is commonly known as "fight over", but few people have used it now. Remember to bite on both sides.