The hottest really excellent ink Symposium

A truly "excellent" ink Symposium

many ink manufacturers are committed to developing better inks. "Excellent" seems to be a more abstract term. Specifically, everyone is looking for an oil that is more widely used, more environmentally friendly, and can print a richer color level. At the same time, in the interests of various policies and government promotion. As for printers, they deeply understand that ink is the key to the success or failure of prints, but new varieties of inks continue to appear. It is not easy to understand the characteristics of different inks and master their usage. In view of this, Dapeng printing materials Co., Ltd. held ink forums in Hong Kong and Dongguan in mid August to exchange ideas with the printing industry in this regard

it is not too much to say that this is a really "excellent" ink Symposium. The content of the symposium was quite comprehensive, including three main topics: environmental friendly ink, water-based varnish and metal ink, as well as the glue and film used in post-processing, which are closely related to printing products. In terms of speakers, in addition to Mr. minggongrong, the managing director of Dapeng, two ink experts from two century old ink brands in Germany were invited to attend the symposium as keynote speakers

all aspects of environmental friendly inks

the symposium first invited HN weeks, manager of offset ink R & D Department of janecke+schneemann druckfarben GmbH (j+s for short), to explain environmental friendly inks and UV inks to the on-site people. Founded in 1843 and with a history of nearly 160 years, inica is the big brother of printing ink companies. The company produces and develops various inks, such as offset ink, flexo ink, spot color ink, UV ink, etc. These inks are suitable for different printing properties, such as paper, card paper, film and film. In Germany, we often work with major machine manufacturers such as Heidelberg and Manroland to develop inks. For example, when Heidelberg tested the eight color underside machine in the German test center, the inks of inika were used. Over the past ten years, European countries have paid great attention to environmental protection, so inica has specially developed environmental protection oil, and the plastic products industry will achieve a total output value of 10billion yuan by 2020. Eks said that the ingredients and manufacturing process of the environmental protection ink natural series developed by yinika are basically the same as the traditional ink. The biggest difference between the two is that natural series does not contain volatile mineral oil harmful to human body and nature. The environmental protection ink produced greatly reduces the impact on the environment and ecology

many environmental friendly inks on the market use soybean oil as raw material, but eks pointed out that soybean oil itself is a semi dry oil, which has the disadvantage of not easy to dry through. In order to speed up the drying speed, printers have to add additives. In this way, although the ink can be quickly penetrated, the stability of the ink will be reduced, which is easy to affect the final quality of the print. Natural series is prepared with flaxseed oil, which is also a natural raw material, but it is a dry oil, which dries faster than soybean oil, and its printing performance is smooth and stable, and its effect is more transparent and excellent than soybean oil. This environmentally friendly ink series to be launched in Hong Kong is suitable for Kirschner sheet printing (pink paper, book paper/matte paper), and can be used to match various traditional inks and spot color inks. In a word, enika's environmental friendly ink can fully achieve the performance of traditional ink

after explaining environmental friendly inks, eks talked about UV inks with the people present. He said that UV inks are increasingly valued for their wear resistance and improving the brightness of prints. However, the following points should be paid attention to when using: 1. Add as little sink liquid as possible. Even if you want to add it, the acid value should be between pH4.5 and 5.5; 2. UV ink is thicker than ordinary ink, so it needs to be stirred frequently; 3. The printing plate should be smooth; 4. Ink rollers should use special rubber raw materials, which cannot contain polyurethane; 5. Like ink rollers, rubber blanket should also be made of materials that do not contain polyurethane; 6. Traditional ink cleaning agents are difficult to completely remove UV ink, so special cleaning agents containing ketones should be used

application of water-based varnish

the next speaker is Mr. Ming Gongrong of Dapeng, who discussed water-based glue, ink glue and water-based varnish in the audience. Dapeng has always been an agent of the water-based glue produced by Akzo Nobel in the UK. Mr. Ming said that water-based and oil-based glues can strengthen the surface protection of printed products, and increase the elegant effect of brightness or dullness of the surface depending on whether the printed products reach light glue or dumb glue. However, compared with the two, water-based glues do not need solvents and are more environmentally friendly than oil-based glues, but people in the industry generally prefer oil-based glues. Therefore, in recent years, Dapeng company has also acted as an agent for AkzoNobel company to produce oily glue. The quality is quite good, and the chance of writing yellowing after glue is almost zero

as for water-based varnish, it is mainly composed of synthetic latex and acrylic resin solution. After being coated with water-based varnish, the wear resistance and brightness of prints are improved, and the brightness of prints can reach 50-78%, depending on the coordination of printing materials. As environmental protection is an increasingly important part of the printing industry, under this premise, water-based varnish has unique advantages. Dapeng's British EF series water-based varnish is very environmental friendly and meets the standards of European and American countries. In addition, it can be used with different devices, or online, offline, and some can be used directly on the printing press. In the past, the quality of water-based varnish has been very stable, and the price has also been reduced, which is lower than that of oil-based varnish. In addition, it also has many advantages, such as short drying time, high brightness and wear resistance, low yellowing degree, wide range of applicable products, and little odor. It is a good choice to improve the quality of printing products

there are many types of water-based varnish, such as ordinary varnish, special-purpose varnish such as mildew proof varnish, varnish that can directly contact food, blister oil and beer brand water oil. There is also a water-soluble gloss oil for ink fountain. It dries quickly. On average, it takes only 15 to 20 minutes to dry thoroughly; Because of its high viscosity, it can be used directly on the printing machine, so the printing machine can be flexibly allocated during printing without installing another oil passing unit. For example, Mr. Ming, if you have a five color machine, you can use the last group of machines to finish the four-color line glazing. In addition, the EF series UV varnish provided by Dapeng can be used with the matching bottom oil, which can be used with the connecting double oil passing unit, and the brightness can be selected as 70-85%

glittering Topstar metal ink

Lin Appleyard, the keynote speaker of the final finale, is the president of offset printing business of German Eckart company. ALCA metalstar metal ink series has long been familiar to insiders. Like innica, aika has a history of 100 years. It has been in the field of manufacturing metal powder, accounting for nearly 65% of the global metal powder market. In the past, the company mainly sold gold and silver powder for manufacturing metal ink. By the 1980s, it further developed the metal ink business

in order to make the metal ink fully refract light and make it perform a good metallic feeling, the biggest key is the raw material of gold and silver powder for making ink. The traditional method of making gold and silver powder is to granulate aluminum, copper, zinc and other metal raw materials at high temperature and high pressure, and then use these metals. But why doesn't China implement such a project on a large scale? The reason is that most of China's ethane is imported and transported to a grinder loaded with steel balls to be ground small. Screen after grinding. If the particles are too large, they will be sent back to the previous grinding and regrinding. This procedure needs to be repeated several times until the metal powder with proper size is grinded out. The whole grinding process takes a long time. Pleyard said that for the production of 600kg gold powder alone, it needs to grind with 12 tons of steel balls for 7 hours

because these metal powders are ground with steel balls, they are of different thickness, and the surface of the powder will inevitably be damaged, so it is difficult to be completely smooth, so they cannot fully refract light and affect the metallicity of the ink. In order to solve this problem, aika company has developed a new method to extract metal fines. The raw material "metal" of the new Topstar metal ink is extracted from a Zheng metal paper. This layer of metal film will be treated in solvent. After treatment, the metal pigment on the film will fall off

with this method, metal powder with uniform thickness can be produced. Because it is not ground small by grinding, the surface is very smooth and can almost completely reflect light, so its brightness is very high. According to pleyard, this metal powder is 100 times thinner than that made by traditional methods. The metal ink made by it has a high coverage ability, and has a good adhesion in post-processing processes such as adhesive film, UV oil, water oil or bronzing. Using seven kinds of base inks, you can mix out ever-changing colors, and print synchronously with general offset inks. However, the metal powder produced by this method is expensive, and only 1kg of powder is produced. Jinan experimental machine factory will design a reasonable solution to meet your testing needs and business status, which requires 10000 square meters of metal film to manufacture

having heard the contents published by the three speakers, the people present have deepened their understanding of the relevant materials, and I believe it will be very helpful for them to choose the appropriate products in the future