The potential of offset inks

At the Drupa Printing Expo in 2000, KBA, one of the world's three largest offset press manufacturers, launched the Rapida 162a ultra-full-offset offset press. The German Health and Safety Commission and the European authoritative environmental protection agency tested various items on site. Emission indicators, issued green printing environmental protection certificate. In 2003, Shenzhen Huali Pack installed the first 5 + 1 Rapida 162a in Asia in the color box factory of OCT. The clean working environment, exquisite ultra-full-open (1200 × 1620mm) single-sheet printing surface and direct-printed micro-wafer cardboard It made the industry people who visited the site impressed with the potential of offset printing technology.

The innovation of offset printing is not only reflected in the green environmental protection of the machine. CTP is widely used in rotary offset presses, the commercialization of color offset presses, the development and application of offset UV inks and water-free inks, and once again aroused the desire of the domestic printing and packaging industry to invest in offset presses. Li Renchao, sales manager for North China of Shanghai Peony Ink Co., Ltd., said, "The printing industry is optimistic about flexo printing in the future, but offset printing and offset printing ink will retain an application rate of about 40% for a long time. For example, domestic beer is marked for a period of time Intaglio is prevalent, but due to the fierce competition in the industry and frequent plate changes, it is still dominated by offset printing that is fast. "

Shanghai Peony Ink Co., Ltd. (formerly Shanghai Ink Factory) is the largest lithographic offset ink manufacturer in China, with an annual output of 15,000 tons, firmly occupying 80% of the southern market share, and expects to expand the northern market in 2006. Peony Ink is one of the few large-scale ink manufacturers with no foreign investment in China. With the cooperation with Sikbe before 2000, management technology and quality services can be compared with Hanghua and Toyo. With the increase in production, the number of employees has dropped from 1400 600 people.

1995-2005 is the 10 years of vigorous development of domestic offset printing inks, the total amount has increased from 30,000 tons to 120,000 tons, a full range of offset printing, including high-end offset printing light quick-drying ink, cardboard ink, matte powder ink, news rotary ink, Cold-setting rotary ink, ultraviolet light curing ink, synthetic paper ink, iron printing ink and new thermosetting rotary ink. The manufacturers are distributed in Shanghai, Tianjin, Hangzhou, Shenzhen and Taiyuan, mostly joint ventures. During the "Eleventh Five-Year Plan" period, China's printing and packaging is expected to maintain a growth rate of 10%, and the growth rate of offset printing inks should be 9%. In the future, products should develop in the direction of multicolor, high speed, fast drying, environmental protection, no pollution and low consumption.

Eco-friendly offset printing ink

For a long time, the air index of the offset printing workshop is difficult to make the printer feel comfortable. Although the stupid ink is no longer allowed to be used, the odor released by the solvent-based highly volatile ink still threatens human health.

Mr. Guo of Yanjing Beer Beijing Shuangyan Color Printing Co., Ltd. said, "Many printing plants used offset printing to print wine labels in the past, and after the technical transformation, they turned to flexo printing, including the printing plants affiliated to the brewery and independent social printing plants. Flexo ink The environmental friendliness of the craft meets the actual needs of future consumption. "

In order to meet market demand, offset press manufacturers and ink manufacturers are committed to the green printing transformation of traditional offset printing. Entering Huali Packaging's closed offset printing workshop, the air pipe exhausts all the volatile gases, the scene is clean and tidy, and the air is fresh. General Manager Zhang Xiaojun praised Gaobao's ability to process inks environmentally.

Environmental protection and non-pollution have become the primary indicators for printing companies to buy inks. Ink products require ISO14000 environmental system certification. End users also require VOCs and solvent residues for printed packaging products. It can be seen that environmental awareness is promoting new types of low toxicity and harmless The development of environmental protection ink.

The non-environmental protection of offset printing ink is mainly manifested in the smell, and the newspaper ink pollution is the most obvious. The printing workshop generally has high humidity, and most of the printing inks use mineral oil as the solvent, which makes the irritating smell of the ink and the solvent very strong, which directly affects the health of the operator.

The general problem is that if the ventilation is increased, the ink will fly, and the air volume will be weakened, and the odor of the ink will be expanded. The environmentally friendly inks currently produced are limited in composition and have poor permeability, which affects the drying speed and does not meet the high-speed printing requirements. Newspaper offset printing inks should not only ensure the printing effect, but also have environmental protection performance. The printing industry has a high demand for environmentally friendly inks.

Microwatt color offset printing

Displaying products through storage and transportation packaging, promoting product design concepts and market demand have promoted the rise of corrugated board technology for direct printing (offset printing) of offset presses. Offset four-color printing has traditionally been regarded as the most ideal printing configuration. Corrugated cardboard has undergone continuous refinement and transformation, and G and N types have successfully concluded the direct printing of offset printing. The existing Roland700, 900 and KBA-Planeta offset printing machines can directly print micro-corrugated cardboard with slight adjustment. There is no washing board phenomenon or corrugated deformation to reduce the strength of the cardboard. The micro corrugated packaging adopts offset printing. The printing effect is good, the colors are gorgeous, and it has a strong color performance. After applying UV varnish, it not only achieves the waterproof effect, but also improves the compressive strength of the packaging. The successful application of offset printing technology has finally made corrugated color boxes replace cardboard boxes.

Since the advent of micro-corrugations in the 1990s, the market usage rate has continued to rise. The United States is growing at a rate of 2% per year, and Europe ’s share in 2004 is estimated to account for 12%, and it is mainly dominated by extremely small corrugations such as F, G and N At present, 30% of the products packaged in folding cartons can be replaced with mini corrugated boxes.

China's micro-corrugated cardboard has just started, and is limited to the production of E-shaped corrugated cardboard. In terms of paper quality and grade, there are few varieties and low grades, which need to be vigorously developed. Many domestic printing and packaging manufacturers have imported four-color offset presses, which provide the necessary equipment foundation for micro flute printing. The total amount of corrugated packaging in the country is 15 billion square meters. If 10% is transferred to microwatts, 3 grams per square meter of offset printing ink will increase the demand for 4,500 tons of offset printing ink.

Quick commercial color printing

Due to the rapid development of offset press technology, small and medium-sized multi-color offset presses are entering the domestic commercial color printing market on a large scale, which is the result of the commercial packaging prints becoming differentiated, functional, and short-form. The technologies used for high-speed large-medium format multi-color offset printing, such as on-line coating, UV printing and flip printing, are configured on small-medium format offset presses, making it flexible, fast and with technical content, increasing the added value of printed products and expanding the application field.

Two major changes in the printing market. First, multi-color printing, high quality, small print volume, and short cycle time have become the megatrend of the entire market. Second, packaging, trademark printing, publishing, and social business printing have invested in equipment Accelerate technological transformation, optimize productivity, and take the road of innovative technology and innovative products. Some leading printers have begun to use four-color offset printing and online offset printing (or UV offset printing process), which indicates that the short-term color printing industry has become a major field. Heidelberg has launched the Speedmaster SM52 online coating and UV offset printing machine for this purpose. Catering to new market trends, this will undoubtedly bring business opportunities to many small offset ink manufacturers.

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