The press is the key to the development of modern offset press technology. The discussion about direct offset printing of corrugated board will not cause such a sensation.
A corrugated cardboard box of VI size can be produced by directly printing corrugated cardboard with a Roland 900 offset press. This is a typical size specification in corrugated box printing.
Roland 900 offset press can print smoothly on substrates up to 1.2mm in thickness. However, this does not mean that the machine is designed for printing corrugated board, because in a short time, the Roland 900 offset press can be changed to a standard configuration for printing plain paper.
Whether it is printing corrugated cardboard or printing other substrates, the machine's printing speed can reach 13,000 per hour. In the printing of 1mm thick cardboard, Roland 900 offset press with a non-stop automatic paper changer can reach speeds of up to 9,000 sheets/hour. Due to the bulkiness of cardboard, the replacement of paper piles during printing is frequent, and the automatic paper changer device reduces the downtime and paper change time without stopping the machine, increases work efficiency, and provides economic advantages.
Due to the economical considerations for the production of corrugated board printing, it is recommended to install the press at 556mm above the ground. By using the foundation above the ground, the non-stop replacement mechanism can be more efficient.
In the direct offset printing of corrugated board, in order to reduce the troubles such as the effect of the washboard, special patented blankets should be used. Such blankets are particularly suitable for direct offset printing on corrugated board.
Roland 900 features 1. The transfer roller on the transfer board can convey the paper without traces.
2. Adjustable paper guides are used to reliably feed paper to the paper feed device and also act as a holder for the paper suction belt table.
3. The modified platen and front gauge prevent back-scratching.
4. The side gauges are push rules to ensure precise alignment of the cardboard side.
5. The diameter-reducing feed rollers with guide pulleys reduce the paper's bending radius.
6. Use a patented blanket.
The glazing can not be a luxury, because: on the one hand, functional glazing is necessary; on the other hand, as a means to protect the printing ink layer and increase the printing speed, it is also necessary. The Roland 900 offset press can be equipped with one or two coating units. The advantages are:
1, can not only full version of the glazing, but also can be partial glazing.
2. The use of pearlescent oil can be used for special glazing, which acts as an anti-counterfeiting effect. Because pearlescent or pearlescent inks (such as Iriodin/Afflair effect pigments) are not easily imitated, the packaged prints have a unique appearance that is difficult to counterfeit.
Summary The successful application of direct printing of corrugated board technology by offset press. The corrugated carton packaging printing has entered a new stage of development. Due to the high quality and low cost of direct offset printing on corrugated cardboard, the printing and packaging industry is no longer ignoring this technology.
The display of products through storage and transportation packaging, the design concept of the promotional products and the market demand have also promoted the rise of direct printing of corrugated board technology by offset presses and established new printing quality standards for corrugated box packaging. Of course, this does not mean that only offset printing will have the future of direct printing on corrugated cardboard. Thick cardboard boxes are still printed mainly by flexo printing. Many long-lasting cardboard boxes will still use flexo printing because of their relatively simple shapes and design patterns. Similarly, top quality corrugated cartons will also be offset-printed and then processed.
Despite all the restrictions, offset printing direct corrugated cardboard has occupied a certain market share and will continue to grow. (Finish)