Offset printing provides another printing effect for manufacturers and their customers to evaluate and choose. This process is different from flexo printing, as the print quality is often useful in image-focused industries.
There are two types of wet offset printing and waterless offset printing: wet offset printing and waterless offset printing.
In wet offset printing, water is delivered to the plate through a damp roller. Where there is water on the plate, the ink cannot be printed on the substrate. Waterless offset printing, water is not part of the process. Instead, the editions are configured differently. The version is still aluminum, but it has a silicone layer and another material layer. The area directly contacting the silicone layer shows ink. In this configuration, the printer will not leave an impression such as a standard offset plate, so it will not be a little bit here. But the life of the version is a bit short, because this is a fragile sandwich. When starting a new task on wet offset printing, material waste can be several times higher, because people find that the balance between water and ink corresponds to the correct production speed. The amount of material waste for waterless offset printing and flexo printing is almost the same.
Kyle Knight, operations manager of Shelton, CT, USA facility of CCL Label, a flamenco-based printer in the United States, said, "Waterless offset printing is similar to letterpress printing machines. Maintaining constant temperature and humidity in waterless printing is critical. "
The cost of offset printing
In terms of comparing the cost of offset printing and flexo printing, it includes several factors. An offset press is usually more expensive than a flexo press. Overall, offset printing equipment is 30% to 40% more expensive than equivalent flexographic printing equipment. This is mainly due to the higher cost caused by the structural design of the inking and dampening unit.
Although the price of offset presses is much higher than that of equivalent flexo presses, the materials printed are even cheaper. Compared to flexo printing, consumables used for offset printing are much cheaper. The cost of making a set of flexo plates is more than 10 times that of making the same set of offset plates. In addition, with the improvement of the quality of flexo printing, the cost of flexo printing is also rising, but the cost of various quality offset printing plates remains unchanged.
The cost of offset printing solvents can be greatly reduced. In Europe, flexo companies generally use solvent-based inks, which is a great cost advantage for offset printing.
Landberg, Nilpeter's sales and marketing director, said: "The production cost of an offset plate of the same size is about $ 6, and the cost of a flexo plate is about $ 60." However, he believes that this cost advantage The difference between relying on printing is between offset printing and flexo printing. He said: "Although the cost of flexo printing plates is higher, the total investment is lower. Therefore, the running cost of offset printing is lower than that of flexo printing, but the waste of offset printing is also greater. The cost of printing 2000 meters of offset printing is lower than that of flexo printing. . But for short work, it ’s more cost-effective to use flexo printing. "
Printers need to remember that training operators to use offset presses is another factor. How to make your operators master the machine well is a challenge. This process is different from flexo printing and needs to adapt to something new. For offset printing, it mainly means that the operator can adjust the color on the machine instead of just installing an anilox roller. In other words, the operator needs to understand this responsibility.
In this regard, Landberg mentioned: "We usually provide a week of compact training. However, all of our offset printing customers receive training that combines other printing processes and offset printing. These include flexo, silk screen, The purpose of gravure printing, embossing, laminating, offset printing, die cutting, cutting sheets, stacking paper is to let customers master all processes, not just flexo or offset printing. "
Why use offset printing?
Recently, printing press manufacturers are very interested in offset printing. This may explain the current market pattern. With the development direction of information digitization, investment in offset presses is becoming more and more a trend. Digital printing and offset printing share the same workflow, and the same data can be used for digital printing and offset printing. The two technologies share the same prepress document management environment, which allows them to achieve the same print quality and share the same standards.
Market pressure is also a driving force for the pursuit of offset printing. Customers of printing press manufacturers demand higher quality and better flexibility. If you want to succeed in this market, you must be unique and think beyond your own scope. Offset printing is the solution to this problem. Press manufacturers are interested in offset printing because label printers have discovered the limitations of flexo printing, or that higher costs are required to achieve the required quality.
In response, Landberg said, "This is a market driven by end customers led by global well-known brands. In addition to more suppliers turning their attention to the high-end field, Newport also introduced offset printing into the label industry in 1994."
Pressure sensitive applications
Because the quality of offset printing is higher than that of flexo printing, the most common pressure-sensitive application with offset printing is mainly dependent on the packaging industry in terms of storage standards. Well-known brand manufacturers of health, skin care and red wine labels have very high requirements for products. They saw an opportunity to distinguish their products by offset printing on the shelves. Many of the design elements of these labels tend to have higher thread count and lower dot spread.
Another application for printers to use offset printing is the requirement for a wider range of substrates. Landberg mentioned red wine labels that generally use offset printing, healthy skin care products, cosmetics and some pharmaceutical products. "As far as pharmaceuticals are concerned, the quality problem of packaging text is far more important than the prominence on the shelf for consumers, because these texts must be accurate and easy to read."
Wide range of applications
Flexo printing dominates the pressure-sensitive label market, especially in North America (second followed by Europe, which has already achieved relief printing), but at the same time, the share of offset printing is also increasing. Today, many printers have used offset printing to print pressure-sensitive labels. Every year at least 30 to 40 offset printings are combined with flexo and gravure printing for such production. And the number will rise.
Landberg believes that offset printing will become more common. He said: "The continuous improvement of the global brands' requirements for high quality and value-added has also formed a second further subdivision. The rapid growth and innovation requirements of self-adhesive labels in the red wine field have followed many beautiful labels Rear."
According to the relationship between technology and economic convenience, offset printing has further increased among global printers, and offset printing has also been introduced to a certain level of technology. I believe that in the future, the number of printers using offset printing will continue to grow, because this technology can enable any printing in the market, including the most complex requirements can be achieved, which also includes customers in their own vision and business methods. change. When you have a printing machine that can do flexo or other processes, it becomes a problem for pattern designers to meet the best printing quality. Offset printing is just another weapon for this problem.
Niu Botai MO line combination printing machine (flexible printing, offset printing, gravure printing, silk printing, hot and cold bronzing and other units can be combined freely)
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