What is it mean of CPT ?
Computer to Plate (CTP)
In the conventional workflow system related to Offset Printing, the film is taken out of the original and the film is exposed with mold and then start printed.
In the Cpt system, the mold is exposed directly from the computer without using the film.
The most important advantage of the system is that it is the acceleration of workflow with the removal of film. In addition to avoiding film-related defects and the lack of film costs, consistency and quality in mold exposure ensures increased product quality.
The advantage of CTP
The main problems of the classical printing process are the possibility that the density of the film is insufficient and the loss of the dot on the film. Ctp solves them as follows:
• Ctp easily overcomes these two problems. Gorgeous prints can be made even in 30 years of printing machines due to its distinctive point structure. On the other hand, the high and sharp structure of the point does not overwhelm the print even when the ink is overdriven, but it makes the colors more vivid and bright. The distribution of the paint on the Ctp point is minimal, according to the spread of the conventional mold.
Form of Pictures
The formats of images to be used in preparation for printing should be TIF, JPEG or EPS. These studies should be performed in CMYK mode, not RGB (4-color unallocated mode). If the file is RGB formatted, it is very important that it is in the correct profile when switching to CMYK mode. Pictures that do not translate to the correct profiler may change with another color tone. You can check this by visually checking CMYK channels.
How to creat Pdf
Adobe is a format developed by the company, the expansion is called Portable Document Format `. PDF documents, which can only be opened by free Acrobat Reader program at first, are recognized by many professional software today. PDF is one of the most important features of document portability. All the data used in the original document (fonts, image documents, vector objects, etc.) keeps all the features of the PDF. (Embedded Features) Users do not end up with the advantages of converting to PDF for presentation, print approval, or even printing.
HOW IS IT PREPARED?
All professional programs have PDF format in export format. Some programs such as Freehand do not have Adobe Acrobat Pro installed, but also carry the pdf feature in itself. It is best to have Adobe Acrobat Pro installed on your system. The program is available in all Adobe CS packages.
Corel, Adobe Illustrator, Adobe InDesign programs such as "save as" command can be selected and exit the PDF option. The easiest way in Freehand is to save the file as Postscript .EPS or .PS and convert it to PDF in the Distiller program which is also included in the program package. Before making PDF; picture formats are correct? (CMYK format, at least 300 dpi? Is there a format problem?) Is the text converted? (transforming into a line) Do you have a share of overflow? These stages are more accurate in terms of health control. When creating a PDF, the Press Quality option from the available options in the program is the correct option for offset.
CMYK and RGB
RGB: Red, Green, Blue
The codes of all the colors of the nature come into being by combining these three basic colors at different ratios,
If 100% is mixed, white is obtained, and when it is 0%, black image is obtained.
Since the main colors of Red, Blue and Green are not fully specified in this space, the colors in your colors will change as the values of the main colors change. As a simple example, we can show you the image change that you get when you play with the contrast setting on your monitor.
CMYK: Cyan, Magenta, Yellow, Key
Cyan, Magenta, Yellow, Black The color space created by the colors.
Basically, the number of colors is C, M, Y. These three colors theoretically add up to 100%, giving black, practically not giving full color, and added later due to the cost of mixing these three colors.
Difference between them
RGB: Empty ground is considered black.
CMYK: Empty ground is considered white.
RGB: Created by intercepting and blocking the light parts of 3 different colors. The colors change as the values change.
CMYK: Tram 4 colors complement each other to achieve the desired color is created. In other words, our print media eyes see the sunlight that reflects on the printed media, not the direct light as in RGB.
CMYK in this context may mean real, RGB imagery
in other words, "press on". In the case of color discrimination, the floors of different colors under an overprint marked as overprint are not emptied.
For this reason, an overprinted object must have a darker color to cover the underlying colors. For example, overprint is usually given in colors that can be used with black and gold-silver gilt-like enveloping ink. Because black is the darkest color and black areas will appear black again no matter what color is underneath. In the same way, there is no need to underestimate the colors that can be used in decorative ink, as they will not interact with the underlying color.
TRICROMY COLOR DISCRIMINATION
Trichrome color separation; cyan, magenta, yellow and black colors, transparent ink and printing support the color separation system. CMYK is a mixture of colors and prints of pictures through print. With this system, millions of color tones can be obtained. It is a color separation system that is used all over the world.
Trigram + Tile Spot Color Separation
This type of color separation does not come out of the CMYK color mixture, and the logo, writing, etc. that need to be printed on an image. as an example. Here, the picture must be printed tricots; but the color that does not come from CMYK will be printed as extra (spot). The spot color may be more than one, depending on the job situation. The point to be noted here is that emptying the gold in all color separations of the areas to be printed on the dash spot in the color separation