How does color management ensure the accuracy and stability of the output color?

The color management system running in the color desktop system requires the stability of output, printing, proofing and printing quality to ensure the accuracy of the output color. On the one hand, color management controls and standardizes the output device, and establishes a feature file, that is, a target property file, to be integrated into the color management system.

1. Correction and description of proofer and printer

Color proofs, whether analog or digital, or pre-press proofs or proofs, are key tools for monitoring each part of the image reproduction process. To ensure accurate color proofs, the important functions are: 1 For traditional analog proofing, To the accuracy and stability of the output of four-color ink proofs, there are three indicators that must be controlled and standardized.
A. Equipment Standard: The equipment is calibrated to ensure that the proofer is in optimal working condition, including proper pressure, standard plate temperature and optimum performance of the air blanket blanket.

B. Material standards: First, standardize the same brand, the same series of inks, do not smash and use each other. Now there are many units of four-color inks that are mismatched, resulting in a different profile from the scanner, which directly affects the accuracy of the color correction, and the correct image file cannot be obtained by scanning. The second is to standardize paper. In principle, the same type of paper should be standardized for proofing and printing. If you use only one kind of ink for proofing and printing, you should use three kinds of papers: coated paper, matte paper, and book paper. Line documents to the press.

C. Quality standards: First, the standard density value of four-color inks is standardized. This is the core of color management for proofing and pre-press operations, because the change in the density of the field has a great influence on the overall color tone. The second is to standardize the relative contrast (K value), which is an important indicator to measure whether the density of the proof (printing) is sufficient, and whether the dot gain is in compliance with the standard range. Generally, the quality of the proof is appropriate, and the K value is above 0.40. Excellent.

At present, there are two problems in some proofing companies. One is that the one-sided pursuit of the dot gain is smaller and the better, and the small dot in the center of the dot is caused, so that printing cannot be caught up. This is a misunderstanding. The proofing dot increase should have a standard range, and it is not necessary to ignore the printing and the one-sided pursuit of dot gain is smaller. Practice has proved that 50% of the outlets increase C, M ink is 8%-10%, Y, K is 12%-13% is appropriate. Second, the proofing uses DIC Japan soft special ink, which has a large gap with the printing ink, which often causes a large difference in the color between the printed matter and the proof, which makes the customer unsatisfied with the printed products. Therefore, it is important to establish the profile file of this ink by using the same brand of ink for proofing and printing. The prepress work must create conditions for the final printing of good products.

2 In terms of digital proofing, the first thing to do is to simulate the color proof effect of the traditional proofing machine proof (printing), and then create the printer's characteristic file by:

A. Through the calibration of the printer, the printer is in an optimal working condition, including determining the type of printing paper used.

B. First, use the traditional analog proofing to produce a standard proof of ISO/IT8.7.3 color standard for automatic color correction by the digital proofer. The IT8.7.3 color code contains 928 color blocks, and has the largest overprinting area for detecting the ink overprinting effect, Y, M, C, K scales for detecting the solid density, and overprinting for detecting the gray balance CMY. District, etc., the content is complete. Of course, all kinds of soft can also use different formats, different color block number of color code files according to their needs, such as Creo. The game angel color management software spw uses the kmart color scale, which contains 450 color blocks. The color code file is generally a TIFF or PS file.

C. The chromaticity values ​​of 928 color patches on the IT 8.7.3 color scale were measured with a colorimeter or spectrophotometer.

D. The measured data is input into the printer profile generation software, and the profile generation software compares and analyzes the chromaticity data of the primary color code and the output color block to generate a new characteristic file of the printer.

With the ORIS Color Tuner version 3.1 color management and digital proofing system, the color of the sample output directly on the Epson 5000 printer is basically the same as the color of the traditional analog proofing. 95% can be achieved by automatically correcting offset proofs, and gravure proofs can achieve 90% accuracy. The system also provides users with a color adjustment tool Fine Tuning with a good operation interface, which can handle both spot colors and background colors, as well as flexible level adjustment and selection tools, which can be used for different tone levels and A variety of colors help to accurately process, to achieve the analog proof (printing) ink color effect. Practice has proved that digital proofing technology has developed to the present day and should be said to be mature. This is the best choice for color management to output accurate colors.

In summary, only the output proofing standardization, the establishment of multiple ICC profiles in the proofing environment, to ensure the accuracy and stability of the output color, on the one hand to the input scanner, so that the application of this profile file to complete the scanning color separation; The aspect is provided for printing standard proofs, so that the input scanning and output proofing and printing can obtain the effect of similar colors.

2. Standardization

To ensure that the quality of the printing plate is stable and to ensure the correct transfer of the tone of the original image, there are three indicators that must be controlled and standardized.

1 equipment standard to ensure that the printing machine and PS version of the developing machine are in the best working condition, including the light source of the printing machine is stable, the illumination is uniform, and the automatic refilling device of the developing machine is sensitive.

2 material standard A. Standardize the PS version of the brand, do not want to use several brands and recycled versions.

B. The developer is compatible with the PS plate, so that the concentration of the developer is strictly controlled, the ratio is accurate, and the new solution can be refilled regularly.

3 quality standards.

A. Determine the optimal exposure time, use the UGRA control strip to control the exposure, and reach the ladder 4 ladder (0.6D), the resolution is 6μ, the 8μ yin and yang lines are complete, and the step control section is 2% small. Qi.

B. Determine the optimal development speed, the correct exposure should be properly developed to match, the UGRA control strip is used to control the development speed, the hollow point after development is relatively clear, and the corresponding small dot is relatively firm, which proves that the developer concentration is appropriate.

C. It is necessary to replace the PS version of a brand and do a standardized test to ensure that the part of the printed version has good oleophilic water repellency and good blank oil and oil repellency.

3. Phototyper standardization

The laser imagesetter shall process the image files processed by the computer and output the CMYK four-color color separation film after RIP. It shall ensure that the dot size value when scanning the color separation setting can be accurately transferred to the color separation film. It has three indicators. Control and standardize.

1 The equipment standard guarantees that the photo-aligning machine and the developing machine are in the best working condition, including the stability of the laser light source, selecting the shape of the dot corresponding to the printability, the mesh angle, the number of mesh lines, and the automatic replenishing device of the developing machine.

2 material standard A. Standardize the film brand, select the film according to the characteristics of the laser light source of the phototype machine. For example, Agfa Photographic Machine is best to use Agfa film, Dolev800 phototypesetting machine selects Kodak 2000, and its dot reproducibility is good.

B. To achieve stable development conditions, choose the syrup that is compatible with the film brand. At present, most of them use Ai Xixi 1000 sets of medicines, and the quality of the outlets is good and does not crystallize.

3 quality standards to achieve linear accuracy, first, control the correct exposure, so that the color separation of the color separation sheet reaches 3.8-4.5, the best is 4.0-4.2, and accurate dot transmission, such as Linear ladder film reaches 2%, 50%, 98% dot reduction, 50% dot ± 1%, if it does not meet the standard, adjust the laser light amount. The second is to stabilize the development conditions, strictly control the concentration, temperature and replenishment of the developer, to ensure that the bottom ash density is controlled below 0.05, so that the white base is more transparent.

In summary, the stability of the post-process and the standardized quality standards are the basis for the stability and improvement of the entire system, which will give the scanner a correct feedback and set the network points within a reasonable range. The transmission between the devices ensures that the color of the image after scanning the color separation can be approximated by the color of the preview and the output proof.

Article source address: http://

Nail Polish

Nail polish is a cosmetic used to modify and increase the beauty of nails. It can form a layer of friction-resistant film on the surface of the nails to protect and beautify the nails.

Fashionable women in late Victorian 1900 used dye creams and varnishes to create soft nail colors.

In 1920, inspired by automobile spray paint, Michelle Menard invented the first bottle of nail polish in the modern sense. In decades of development, because of the influence of harmful ingredients in nail polish, nail polish has updated its formula countless times.

In 1980, Tinkerbell Company invented the first bo-po (apply and tear off) nail polish, and it became the most desired cosmetic product for girls of that era. There are also tear-off nail polishes, but the most successful product of this type is undoubtedly the Minx brand. There are so many colors and patterns that dazzle you.

Nail modification is an important part of women's beauty. Beauty-loving women always use bright red nail polish on their long nails. To show the charm of slender hands.

But before beautifying nails, nails should be modified. The first is to remove the old nail polish. Dip the Nail Polish Remover with cotton and rub it from the bottom of the nail to the tip several times to remove it completely. This can also allow old nail polish to penetrate into the epidermis or surrounding tissues.

Then use a Manicure tool to trim the shape of the nail. After finishing, soak your hands in soapy water to make the outer skin soft. Then use a towel to carefully clean your fingers and finger gaps, while slowly pressing the fingers clean so that the skin is close to the nails.

If necessary, cuticle scissors and small tweezers can be used to remove the internal thorns and uneven dead skin of the nail root.


Nail Polish Also Called Nail Lacquers,Nail Enamels,‎Nail Polish Collections,‎Gel Nail Polish etc.

Nail Lacquers,Nail Enamels,‎Nail Polish Collections,‎Gel Nail Polish

Jilin Xiangqi Technology Co., Ltd , https://www.xiangqicosmetics.com

Posted on