Where are the details about printing. More comprehensive?

by admin

Full set of information. Pre printing processing + post printing processing + quotation ` ` ` similar

I. common paper for printing
newsprint: newsprint is mainly used for the printing of newspapers and some letterpress books and periodicals. The paper is soft, elastic-plastic, strong ink absorption ability and certain mechanical strength. It is suitable for printing on various high-speed rotary machines. This kind of paper is mostly made of wood oars and contains more lignin and impurities. The paper is easy to turn yellow and brittle, and the water resistance is very poor, so it is not suitable for long-term preservation
relief printing paper: This is a special paper for relief printing. The nature of the paper is similar to that of newsprint. The water resistance, color purity, smoothness of the paper surface are slightly better than newsprint, and the ink absorption is more uniform, But the ability of strong ink is worse than newsprint
offset printing paper: offset printing paper is a kind of paper used for offset (lithographic) printing. It is divided into single-sided offset paper and double-sided offset paper. Single-sided offset paper is mainly used for printing posters, packaging boxes, etc; Double sided offset paper is mainly used for printing picture books, pictures, etc. Offset paper is compact, with small flexibility and strong water resistance, which can effectively prevent paper deformation, dislocation, roughening, powder removal and other problems during multi-color overprint. It can maintain good color purity for printed matter
offset coated paper: also known as coated paper, it is a kind of high-grade paper made by coating a layer of inorganic paint on the paper surface and super calendering. The surface of the paper is flat and smooth, with high color purity. During printing, it can get more detailed and smooth dots, which can better reproduce the sense of hierarchy of the original. It is widely used in art pictures, picture albums, commercial leaflets, etc
gravure printing paper: gravure printing paper is white and strong, with good smoothness and water resistance. It is mainly used to print banknotes, stamps and other printing materials with high quality requirements and not easy to copy
whiteboard paper: Whiteboard paper is a kind of paper with relatively uniform fiber structure, filler and rubber components on the surface and a layer of coating on the surface. It is made by multi roller calendering. The paper has high color purity, relatively uniform ink absorption and good folding resistance. It is mainly used for commodity packaging box, commodity surface lining, picture and wall chart, etc
synthetic paper: synthetic paper is made of chemical raw materials such as olefins and some additives. It has soft texture, strong tensile resistance, high water resistance, light, cold and heat resistance, chemical corrosion resistance, no environmental pollution and good air permeability. It is widely used in the printing of high-grade artworks, maps, picture albums, high-grade books and periodicals

2. The general and common methods of making up can be divided into the following:

1. Single sided: this method refers to those printed materials that only need to print one side, such as sea newspaper, which only need to print the front side, while the back side does not need to be printed
2. Double sided: commonly known as “bottom plate”, it refers to printed materials that need to be printed on both sides, such as some small leaflets, small posters, cards, etc
3. Horizontal rotation type: commonly known as “self reproduction” and “on page turnover”, it is applicable to the printed matter of magazines, books and periodicals. For example, there is a 16 opening magazine cover, which is divided into four pages, including cover 1, cover 2, cover 3 and cover 4, which need to be printed. When making up, cover 1 and cover 4, cover 2 and cover 3 are put together horizontally, and then cover 1 and cover 4 The second cover and the third cover are assembled head to head on a four open layout for printing. After one side is printed, turn the paper 180 degrees horizontally and continue printing with the reverse side. After completion, cut the printed matter from the middle to get two identical printed matters
4. Flip type: use the same printing plate to print on one side of the paper, and then flip the paper to print on the back, but take the other long side of the paper as the “bite edge”. This method is commonly known as “overturning”, but now few people use this method again

III. what to do before output
1. Simplify EPS image – if you want to say the final reason, in the postsrip file, the overly complex path is the culprit that makes the file unable to print correctly. Paths with too many nodes or too low smoothing settings will increase the complexity of the file, cause the laser printer or Phototypesetter to crash, and lead to fatal “” or “vmerror” postsrip errors. In particular, when sending files to high-resolution output devices, you should split complex paths and set high smoothness in or, or use the instructions to simplify paths in freehand. When tracing, path simplification is used to reduce the complexity of the path. Use high tolerance reading values in Photoshop to reduce the number of nodes when the selection becomes a cut path. Do not insert EPS images into other EPS files. Like this: input several EPS images into a file, store them as EPS, put them into one page, store this page as EPS, and then put them into another file. If you’re lucky, that document happens to print. However, as each layer is placed into EPS, the chances of success will be less and less. If you have to convert the EPS of a complete page into a file that can be dot matrix by Photoshop. Let Photoshop change the file into a dot matrix image, and then store it as EPS or TIFF of Photoshop. Neither of these formats adds an additional layer to the postsript language
2. Make the gradient smooth — the gradient using and the mathematical operation method works well in a short distance of a few inches, but if you try to make a subtle gradient of the whole page, the limitation of postsrip may lead to a banded effect. Make the gradient into a dot matrix image in Photoshop (use add noise) and then input it into other application software. However, Photoshop cannot be used to deal with inner layers. Compared with the gradient generated directly in the Photoshop palette, the files processed by Photoshop cannot produce the ideal intermediate gradient
3. Make good use of fonts – many output centers don’t want to see TrueType words, and postsrip has become a standard. TrueType usually has the same word name as the corresponding postsript word, which will cause conflict. TrueType must be manually downloaded to the rip of the Imagesetter, which is very time-consuming. Contact the output center in advance. Do not use the font command to produce bold or italic effect. It is best to select the desired font effect directly from the font menu of the application software. If the font does not have the desired bold or italic effect, and the font command is used, the Mac will pseudo create a bold or italic effect for each word, but this is only on the screen. If it is output on the printer, the final printing effect looks like it has not been used at all. So, what is the effect of using the bottom line? Do not use fonts that do not have the effect of the font itself, but need to use the font command. If you use a font with beautiful serifs or fine strokes (Bodoni is a good example), and the size of the word is set to be very small, do not separate the color of the word. Otherwise, even if the alignment on the printing plate is slightly misaligned, it will cause inaccurate overprint of the most sensitive parts
4. Color conversion — before sending the file to output, convert the RGB color into CMYK. Of course, RGB color looks very good on the screen, and many professionals prefer RGB mode, but do you know? What will these RGB images look like a
fter color separation or printing (many typesetting software can’t even separate RGB images in the past). Before putting images into typesetting software or sending them to the output center, convert them to CMYK format (in Photoshop or other software that can do this conversion). Make sure that a spot color is not specified as a spot color, or vice versa. One such mistake could destroy a film. If your time is precious and you pay for the film yourself, you certainly don’t want it. Make sure that the color you define in the typesetting software is the same name as that used in the image processing software. Otherwise, the typesetting software will process the color separation defined in and freehand into spot color. Now, and PageMaker can recognize this color and add the color name contained in any EPS file placed in it to the color list. Therefore, this danger is not too great, but I still mention it to you here
5. Use numbers — now each typesetting software provides two methods to determine the size and position of page elements. One method is the perceptual method of clicking and dragging the mouse, and the other is the objective method of inputting numbers from various dialog boxes and control panels. To make sure that the width of a box is exactly one and a half inches, The only correct way is to enter 1.5 in the width field “, rather than using eyes or aligning reference lines and dimensions.
6. Set the layout page to the actual size – in the previous unsatisfactory days, prepress workstations and phototypesetters could not record bleeding beyond the page range. If you want to get correct bleeding, you have to change the page size in the layout software to adjust the actual page size And bleeding. This must have a larger page size so that the cutting line can be drawn and placed manually, which is easy to make mistakes. Today’s prepress equipment is no longer hindered by these restrictions (today’s phototypesetters can record larger format and use wider film). Most printing devices recommend setting the file size to the actual size of the page, so that the application software can automatically generate the correctly positioned cutting line
7. Organize your documents — Talking about this may be superfluous for the veteran, but it has to be stronger for the novice. In addition to bringing all the image files used in the file, you should also bring the dot matrix word (screen display) and outline word (printer) of postsrip word used in the file to the output center. Now most typesetting software is similar to the command of collecting and outputting files, which can get a detailed report on the files and automatically copy the files to a folder, floppy disk or syquest disk. If the output center has a high configuration, they must have Adobe word library, so you don’t have to bring the words with you
8. Check the documents — what can be done and what can not be done are mentioned in steps 4 and 7. Are you confused? In fact, it is a very simple inspection. The check should include: check every missing page element, incorrectly defined color and postsrip error. The inspection tools are simple like adobe for PageMaker or systems of Merritt’s or acquired knowledge’s dowmload mechanical. Panther proof or adobe preprint Pro can perform screen preview of low resolution output, so that you can check and solve common errors before output. “Huayan proofing” software has the powerful function of finally checking whether the document is wrong
9. Print file — proofing output file, which should be marked with color separation. If you can’t find a color printer around, the color labeling method used in the past is very useful. And large color separation, which is very useful for hollowing out and overprint
10. Make a call to contact the output center — not at the end of the workflow — contact the output center from the beginning. adopt

Related Articles

Leave a Comment