The main issues in the prepress output check

1. Characters are wrong or missing; ensure that fonts are not reported when the typesetting file is opened, or permanently replaced with similar fonts after the customer agrees; ensure that the characters in the typesetting file are the actual characters selected from the character menu, not from the style menu A similar "bold" style was chosen; note that in some RIPs, character substitutions and string bits are caused by the mutual interference between True Type and Type 1 Postscript characters.
2. The format, mode and resolution of the image; check the image link to ensure that there are no missing images; ensure that the image format is a common format (TIF, EPS, etc.) and ensure that the image or color patch is a CMYK four-color printing mode (RGB The mode will turn grey when RIP separation.) To ensure that the resolution of the image is suitable for printing requirements, do not excessively scale the image.
3. Overprint and overprint color; pay attention to whether some black text and lines are set overprinting (separation inspection is hollowed out), black text with a monochrome black, to avoid the emergence of four-color text; In addition, if it is manually added to the logo money Must be determined as a four-color jacket color.
4. Imposition and marking; know the way of binding the documents to ensure the correct folding of the imposition, the imposition of large pages should have a finished line, register line, (folding line, spine line - for folding and binding books cover ) Required marks such as step scale and color identification; bleeding is done.
5. Bleeding and graphic margins; bleeding to be in place (usually 3mm, sometimes affected by the paper size or post-press processing conditions can be done 2mm-5mm), the layout of the text and finished product line to maintain a certain distance, In order to avoid being cut off or affect the appearance of the page.
6.Graphic spacing and color difference; ensure that the image is not embossed (In some typesetting software, when the imposition or repositioning of the image and other operations, the mutual exclusion of the image and text often fails, so that the image is pressed on the text) ; Ensure the clarity of the text on the base map (When the text is pressed on the base map that you want to near the color, pay attention to add a shadow or an edge and other modifications).

Five major elements of printing are five elements: manuscripts, plates, inks, substrates, and printing machinery.
Manuscript: A generic term for pictures, drawings, photographs, negatives, printed products, etc. copied in a copying technique. The manuscript requires a clear, sharp tone, suitable for printing.
Plate: A printed text carrier used to transfer ink to a substrate. Divided into graphic parts and non-graphic parts.
Substrate: A substance that accepts ink or absorbs colorants and presents graphics. (Color is generally used for copying.) I once heard people say that except for water and air, all the world's materials can be used for printing.
Ink: An imaging substance that is transferred to a substrate during the printing process.
Printing Machinery: A general term for machinery and equipment used to produce prints

Precautions
CorelDraw 6.0/8.0/9.0 RGB mode text, frame, fill, must be converted to CMYK color mode. If CorelDraw used POWERCLIP (exactly cropped images), please specify when posting.
In CorelDraw 8.0/9.0, if the PSD format image is rotated, the TIF image has redundant channels, and the image is easily damaged. Please convert the image in CorelDraw to a bitmap. Please use the TIFF format when publishing and use RIP. Look at the preview. If there are problems with the conversion of pictures using the PSD format, the company is not responsible for the consequences of the film. Please use it with caution.
Use effect in CorelDraw 8.0/9.0, please convert to bitmap. If there is no problem with conversion, the company is not responsible for the consequences of the film. Please use it carefully. CorelDraw 8.0 grayscale PSD mode picture, the film is superimposed, must be converted to CMYK color mode.
Founder file layout please generate PS file, if any, please specify.
Use Mongolian fonts when posting Mongolian files.
Word documents can not be colored, can be spelled into a large version, easy to appear off the word, off the map, please look at the preview on the RIP confirmation after the film.
PageMaker 6.0/6.5 files, TIFF format pictures are easily elongated, please use the EPS color separation format. Founder fonts are prone to damage. Please do not use them.
If the customer wants to export MOs, CDs, or HDDs for storage, do not store other files and make backups. If they are accidentally damaged or lost, the company is only responsible for repairing or paying compensation for MO discs, CDs, or HDDs.
Any documents that come out of our company will be retained for a maximum of 24 hours. If you find a problem with the film, please make it within 24 hours after the film is taken. Expiration will not be responsible.
The client is the final inspection. After proofing, please print and proof, or make a sample after proofing. If there is something wrong with the issue, the company is not responsible for any joint responsibility other than the film.