The era of "lead and fire" is the era of unique printing proofing, the era of "light and electricity" is the era of coexistence of printing proofing and photochemical proofing, the digital era of "0 and 1" will be digital hard copy proofing and display-based soft proofing Technology becomes the mainstream and common development era——
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Pu Jialing Deputy Dean of Beijing Printing Institute.
He has always had a dream, dreaming of running Beijing Printing Institute like a university like Rochester Institute of Technology. Not in all fields, but in the field involved becomes the best.
From the perspective of the development and evolution of proofing technology. Due to the continuous development and improvement of display technology and color management technology, soft proofing technology has become increasingly mature and has been applied in the industry. This article takes soft proofing technology as the main line, in order to make an analysis of the development and application of this technology.
Review and prospect of technological development
Soft copy proofing (usually referred to as soft proofing) refers to a display-based and display medium proofing technology. Unlike hard copy proofs, the proofs obtained by soft proofing are often screen-based soft copy proofs (images) with "visible" , Untouchable "feature.
Because of such a feature, Soft Proofing is also called Virtual Proofing and Screen Proofing.
If the development of printing technology is characterized by the degree of digitization, the development of modern printing technology can be divided into three stages, namely the analog era, the era in which analog and digital coexist, and the digital era.
In such a technological change, the proofing technology is also quietly changing. The most traditional printing proofing and photochemical proofing based on photochemical reactions have gradually withdrawn from the market. Digital hard copy proofing technology has been applied since the late 1980s. It has gradually become the most important proofing method in the digital age. The remote proofing, which began in the mid-to-late 1990s, has shifted from printing technology to the digital age, as well as the localization and globalization of print production and services. Its importance and advantages are continuously recognized by the industry. From the perspective of development trends, display-based soft proofing technology is suitable for digital and network environments. It has the characteristics of high speed and low operating cost, coupled with the continuous improvement of color management technology and display technology. Improvement will surely become a major proofing method in the digital age.
The soft proofing technology that directly outputs the digital page (digital film) through the display output, because it is fast, low cost, and does not need to make a hard copy proof, it is very suitable for remote proofing requirements. However, this method of pretending is based on the additive color system (R, G, B additive color display) of the screen display. It is very different from the actual printed matter in terms of display principle, color gamut and materials.
"Sample = printed matter" faces huge technical challenges.
Difficulties and challenges facing soft proofing
"Seeing is what you get" (WYSIWYG: What You See Is What You Get) is considered to be the ultimate goal of the development of proofing technology. To achieve the "what you see is what you get" goal, color management technology is the guarantee, high-quality, reliable and stable displays are the premise.
From the current state, soft proofing technology has matured in terms of hardware, test correction and color management. However, whether it is a soft proofing system based on CRT or LCD display, it will face some common challenges and difficulties. The reproduction of spot and fluorescent colors is still a major difficulty in soft proofing. With the continuous advancement of display technology, the ability of soft proofing to reproduce spot colors is also constantly improving,
However, due to the limitation of the display principle of the display, the reproduction of the fluorescent color is almost impossible. The reproduction of metallic colors is another huge challenge faced by displays, so that the application of soft proofing in packaging and printing will also face huge challenges and difficulties.
Even if all the above problems are solved very well, the display is based on the principle of the additive color display of the luminous body. The printed matter is the display principle of the non-luminous body subtractive color method. The difference in the display principle between the two will still cause the human eye to produce a different feeling during observation, which will also lead to errors in the evaluation of the consistency of the two. In addition, the difference in "texture" between the display and the paper may be the most difficult "curable disease".
Because the common characteristics of digital hard copy proofing and (digital) soft proofing are in line with the requirements of the digital, network era and computer integrated production and open environment, these two proofing technologies are complementary in most technical indicators, but The outstanding advantage of hard proofing is that it is most likely to be completely consistent with the actual printed matter, which can meet the requirements of different professional printing categories (books, packaging, cards and other categories of printing), and the outstanding advantage of soft proofing is fast (can be achieved online Real-time proofing). Low cost (no need to use consumables and other auxiliary equipment), but there may be some difficulties in packaging that needs to reproduce metallic colors, fluorescent colors and spot colors. Therefore, these two proofing methods have their own advantages, complement each other, and will share the proofing market together in the digital age.
Remote proofing technology
The remote proofing process using soft proofing can realize the "real-time" proofing process, greatly shortening the proofing cycle and improving production efficiency. According to statistics, in the production process of publications, 60% of the time is spent in the proofing process. The advantage of remote proofing in time and the current global development trend of print production are the biggest driving force behind the development of this technology.
The success of the application of remote proofing technology based on soft proofing depends on whether the soft proofing technology meets the requirements of print proofing in terms of color accuracy, stability and reliability. In addition to ensuring the matching of RGB and CMYK, it must also have a high-speed communication network to ensure the rapid transmission of large data files. At the same time, the system itself should also have convenient and reliable communication tools to ensure that the modification and confirmation of the proofs can communicate accurately And record the relevant process.
Different from the traditional hard copy proofing, all of these cannot use hard copy proofs as a carrier of communication, and all will be done digitally. At present, many remote proofing systems provide more complete annotation tools, which are still being improved and developed technically.
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