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In another form, an intermediate file that captures the RIP but does not generate the lbitTiff data information is used for interpretation. Under normal circumstances, the file in this state is compressed by the phototype RIP. In addition, all the information in the file is maintained, and the network control information is also included. Solve the problem of large file data volume. This kind of file is much faster than the former in the production process, but it is still relatively slow compared to the PS and Tiff formats of the pre-RIP proofing software.
The most worth mentioning here is BlackMagic2, 5.3, which not only supports the file formats compatible with RIP pre-proofing software, but also receives most of the RIP post-data and intermediate files. Is currently the most comprehensive digital proofing application software RIP products.
For digital proofing RIP, in addition to the above-mentioned printing RIP function, the realization of the color management function is its most critical technology, which is also the most essential difference between digital proofing and printing.
The existing digital proofing color management functions include two forms, one is to support the ICC format of color management; the other is a color management system that does not support the ICC format. These digital proofing RIPs have their own unique color management technologies and methods. Most existing digital proofing RIPs support the ICC format.
CC is an open color management format that is currently used by most international color management. Commonly used digital proofing software including ICC format, BestColor series products, BlackMagic, ColorExpress, O. R. I. SColorTuner et al. Among them, BestColor has the highest market share in the popular digital proofing market all over the world. It features a simple operation interface and is generally applied to high-quality, low-cost printers. It is excellent in controlling the printing color gamut and printing color gamut. The space conversion capability is strong, and several profiles of recommended papers and dozens of foreignly-used printing ink profile files are pre-installed. Powerful printing, support for network printing.
Digital proofing software is not the final product to solve color management, it only provides a platform for color management. A standard color management system must be able to generate three basic profiles. That is, a profile file of the characteristics of the ink of the print paper, a profile file that reflects the print feature, and a printed ICCProfile file that has undergone the color space conversion and correction are selected.
There are several ways to obtain the properties of a printed paper:
First, from the printing software program the original production of paper, this type of paper is generally provided at the factory standard profile file, but due to the price, channels and other factors, the paper is difficult to guarantee;
Second, the printer manufacturers recommend paper, are imported paper. This type of paper generally does not provide Profile files. It needs to be tested and screened by a color lab of a professional digital proofing service company and then measured. The main indicators should meet: 1 The color gamut of primary color, inter-color, and multi-color overprint should be larger than the printed color gamut. 2 Color stability The color saturation value of saturation color stability is less than 厶E at normal temperature and humidity conditions within one week. 1
Third, choose their own cost-effective paper, including domestic materials. However, after testing, domestic paper is currently affected by the humidity environment, unstable, and some color indicators can not reach. Domestic materials are not recommended at this stage. There are three types of commonly used paper for digital proofing:
Glossy paper, generally simulated high-grade coated paper. The paper particles reflect fine, contrasting, full color. Better than print visual experience, low-key performance.
Semi-high glossy paper, its effect is between the glossy coated paper and the matt coated paper, which can basically simulate the effect of the normal coated paper, and the overall visual experience is close to the printed matter. This is the best recommended recommendation paper, but such paper There are few varieties, few kinds of options, and prices are relatively expensive.
Matte paper, the overall paper and images are basically dull, and the effect is a certain distance from the printed paper. The low-key performance is poor and can be used to represent the production of Chinese paintings and other reproductions. At present, ordinary digital proofing papers have different degrees of discoloration, and their color stability is inconsistent. Some models have special outdoor inks, and their color stability is good, but some individual ink inks have partial color gamuts that do not meet the targets. And the price is too high. Profi, e-characteristic documents for printing paper are an important part of color management.
(to be continued)
The application of digital proofing technology and the important role of software (3)
TIFF format, although this format is 100% accurate, but the file data volume is very large, resulting in its very slow processing speed, low production efficiency.