Real network digital proofs

In the past few years, digital drafting has been initially suspected by users as being viable. Nowadays, large and small plate-making companies, advertising companies and design companies have introduced them. It shows that their acceptance is very high. Especially with the CtP system has become popular, digital writing is an indispensable part. In 2002, the digital copying system technology reached a higher level. In addition to the correct color, it is now possible to connect with various CtF and CtP processes, and to preview the appearance of prints. Soft hit the net problem.

Digital drafting has existed for a long time. At the beginning, most of the manufacturers were closed systems using inkjet printers or sublimation printers. With their unique color silk school, this print product was close to traditional print or print. However, these systems are often expensive and have high operating costs. However, the quality of these systems is still a long way from traditional drafting or print. Therefore, the acceptance rate is very low. Until 1999. BEST company in Germany launched the BEST COLOR digital proofing system based on ICC's color management standard, which enables general inkjet printers to also output high-quality, color-quality digital copies. The entire system costs only about HK$40,000 and the printing cost is about HK$15 per A3 Extra.

Breakthrough Scripting

It is not difficult to print color-accurate samples on inkjet printers through the ICC Profile. As long as the ICC profile produced is accurate, linearly adjusted, the printer is stable, and the entire system is set up correctly, it is not difficult to obtain accurate digital color proofs all over the world, but Mr. Lin Xuesen, a director of Grande Technology, believes that it is accurate. Digital writing, in addition to accurate color, should be able to see the issues that will occur when printing. Therefore, BEST launched the new BEST Screen Proof digital printing system at the end of 2001, officially bringing digital drafting into the new era.

During the platemaking process, the Postscript file is transferred to the RIP of the imagesetter and calculated as a bitmap and output to the imagesetter. Calculating and forming bitmaps in RIP will add RIP manufacturer's unique outlets, so that the final output film has different CMYK outlets, but in the process, some images, such as clothes, stripes, or speakers Hood, after the RIP screen will appear strange ripple, or known as the pattern. These patterns vary depending on the shape of the dot or the screen.

The past inkjet digital hitting the Beijing system will only use a unique network (usually a random network), and will not use the actual output of the film when the network, so make some of the grain will not have a fingerprint in the inkjet printer output.

In order to make digital drafting fully predict the appearance of prints and collisions, and to have accurate colors, we would like to have the following information:

(1) The characteristics of film webs are the shape of web lines, web corners, and web sites.

(2) The characteristics of printing. That is, the dot gain curve.

(3) The color characteristic is the hue of the ink.

As long as we extract 1-bit TIFF from the RIP of the imagesetter, we can obtain various features in the film. The 1-bit TIFF is actually equivalent to the digital film. When the Postscript file is calculated and imaged online in the RIP, each color version will become a high-resolution black and white (so 1-Bit) net image, usually stored in TIFF format. . Finally, these 1-bit TIFFs are sent to the photo machine for exposure to the film. Therefore, the characteristics of the network in a 1-bit TIFF are exactly the same as those of a non-forest.

Other than 1-bit Tiff file

The use of 1-bit TIFF as the original file for digital copying is only the beginning. The increase in network points when printing is trapped in printing will cause the final printing outlets to change, and different printing processes will be different. The hue of the ink will also change depending on the ink supplier, so the variables that occur in real-time printing are not available in 1-bit tiff. In fact, as long as we have a printed ICC PRO FILE will have access to the above two kinds of information, ICC PROFILE has ink down and increase the hue, accurate. Therefore, in the Screen Proof digital profiling system using 1-bit TIFF, ICC PROFILE provides important dot gain and ink hue data. Only in this way can the digital web-based digital profiling output accurately print the same web as the printed matter. The grain is naturally placed on the inkjet print by this technology and printed in the same color. And these are just a few other ways to use 1-bit TIFF only, but they can't be done using the digital copying system of ICC Profile. They can only be called 1-bit TIFF print drivers, not digital ones.

The left side is the traditional drafting, the right side is the use of the Screen Proof system to print digital drafting, careful observation, visible digital copying, reproduce the print of the guiyang pattern

Has the outlet been simulated?

Screen Proof's dot technology is not analog, and its true net point is not removed and re-screened, so ensure that the characteristics of the network are the same as RIP output. The technology of color-managed 1-bit TIFF through the ICC Profile is BEST's patented technology.

Screen Proof is not only able to input 1-bit TIFF digital network digital writing, but also can input Postscript, PDF, Delta List, CTI/LW, TIFF and TIFF/IT for traditional web-free digital pro Need for different workflows. Especially in some of the larger users have a variety of film output RIP such as Heidelberg Delta, Creo Scitex Brisque/Prinergy, Dainippon Screen/ Harlequin, Agfa/Taipan, Screenproof can simultaneously accept the digital film files they flow over such as Delta List, CT /LW, etc.

Paper is color accuracy

In ink jet digital printing system, the cooperation of paper and ink is also very important. Therefore, BEST has independently developed a series of special papers for digital drafting, which are suitable for simulating powdered paper, book paper, newspapers, paper and even powdered paper. All of these papers have the most stringent quality control, ensuring that each box or roll of paper has less than three Delta E errors after inkjet. In addition BEST understands the characteristics of digital writing, so the coating of paper is also a special research and development by German scientists, and the printing color gamut is even greater. In addition, these papers have high light fastness, low phosphor content, and can also be used by Dye for Pigment inkjet printers to ensure that each printer can also have a special "hand"-consistent paper, making the digital copying effect more stable. accurate.

Each appropriate

In addition to Screen Proof, Best Color also launched two sets of Color Proof and Designer Edition solutions, which are suitable for the actual needs of different companies within a company. For example, the design department is pursuing a digital snoring system that allows them to print out color accurately. Therefore, they do not need to use Screen Proof with true dot technology. A Designer Edition is enough to meet the needs of designers. When the company uses all three sets of the same series of mother-to-money writing programs, there is no need to worry about different colors appearing in the same file under different software. The color technology they use is the same, so it is impossible for different printers to appear with different colors. The situation of writing, therefore, can easily unify colors and facilitate internal communication. As far as Mr. Lin is aware, there is not yet a prepress software manufacturer on the market that can provide such a comprehensive range of solutions. Only the Best series can completely satisfy the different processes from design to color separation to printing. Claim.

In a word, digital copying with outlets is not equal to everything. If there are no ICC-included outlets that increase curve data, the printing outlets cannot be printed out. Collisions and patterns cannot be reproduced with 100% accuracy. Non-web digital proofing is even worse, so users should understand the technical and practical implications of digital copying.

Reprinted from: Design Story