With the maturity of digital printing technology and the continuous reduction of its costs, printing manufacturers have begun to combine traditional offset printing with new digital printing technology. Their goal is to provide a unique value-added service and turn it into profit. Newspapers, labels, plastic cards, retail leaflets, mailing advertisements, human resource manuals, etc. These applications will benefit from the combination of color offset printing technology and monochrome digital printing technology. However, the combination of new and old technologies faces many technical challenges. In the process of combining offset printing and digital printing, printing manufacturers need to fully consider factors such as substrates, inks and the environment. Because for one printing method, certain conditions may be ideal, but for another printing method may not be suitable. Only by effectively controlling the variable factors in printing can these two technologies complement each other. Based on the above reasons, this article focuses on several key factors that determine the success of the "fusion" of offset printing and digital printing. 1. Ink Ink is an important factor that affects the combination of offset printing and digital printing, and its performance will directly affect the quality of printing. The way to solve this problem is to use a high temperature resistant "laser adaptable" ink. In order to determine the ink's laser suitability, the GATF laboratory provides a test method that simulates the pressure and temperature of a digital printing press. Use a plywood to load the ink and paper under the pressure of 25 lbs and run at a high temperature of 111 ° C for 30 minutes. If the sample is stuck, it means that the ink is not laser-compatible. 2. Drying and curing 3. Paper The user should choose the type and quantity of paper according to the characteristics of the digital printing machine. Digital printing paper generally has the following characteristics: low water content, smooth surface, and alkaline. Papers with rough surfaces should be avoided as much as possible, such as substrates with uneven surfaces or rough textures, because it is difficult for toner to adhere to the surface of such substrates. DigitalMarket is a printer that specializes in providing personalized mail and advertising mail. 85% of its jobs use "pre-printed" substrates, that is, some graphics are printed with offset printing, and then printed with a digital printing machine. Change information. Executive Deputy General Manager Joel Hoefle explained: “Our goal is to make those black, content-changing fonts look as if they were printed on an offset press.†The company uses Fuji Xerox ’s DocuTech 6135, 6180, DocuColor and HP Indigo Press1000 digital printing machine. In order to achieve the desired results, they strictly select and test new printing materials and insist on using paper recommended by digital printing machine manufacturers. Hoefle added: “We also pay great attention to knowing from the paper manufacturer which types of substrates other digital printers have purchased, and what are the most popular papers currently on the market to help us make the right decision.†4. Crop When transferring the printed sheets printed by the offset press into digital printing, you must pay attention to the cutting operation. 5. Storage of printed matter Digital printing skills 1. For those proofs that need to be printed by a combination of offset printing and digital printing, toner-based printing has another place worth considering. 2. The image or text printed by the digital printing machine should be 0.125 inches to 0.25 inches from the edge of the proof to avoid cracks in the toner. 3. Try to avoid overprinting digital printing toner on offset printing ink, because the adhesion of toner on offset printing ink is not strong, if you must use this method, it is best to use offset mesh to adjust the image. 4. Leave enough space in the area of ​​digital printing images and pre-printing of offset printing to adapt to various changing factors in the printing process. At the same time, unnecessary overprinting should be avoided. 5. During the digital printing process, ensure that the paper is in portrait orientation.
Gift packaging
Amazing colors and vivid patterns .
High quality fashion options.
Eco friendly solutions,
Customized designs. Gift Packaging Gift Packaging,Gift Packing,Gift Wrapping,Chocolate Gift Box Weifang Sunshine Packaging Co., Ltd. , https://www.paperboxbagpack.com
Ink is the cheapest but most important of many factors in printing production. Many offset printing inks are not suitable for digital printing presses, because offset printing inks often contain a large amount of wax and resin in order to improve the friction resistance of printed products. If the printed sheet just printed by the offset printing machine is sent to the digital printing machine immediately, the sample will withstand a high temperature of 111 ℃ (at this temperature, the toner in the digital printing machine can melt and adhere to the surface of the printing material), so The wax and resin in traditional offset inks soften, causing ghosting, smudging on the back, yellowing of colors, and blurred images. Metal ink and fluorescent ink also have the same problem in the digital printing process, the peeled ink will stick to the printing press cylinder.
Laser-adaptable inks contain little or no wax, resin and other components, so the friction resistance is relatively low. Therefore, special treatments such as glazing of printed sheets are required to fix the ink and toner. In order to avoid softening of offset inks, printing manufacturers need to go through trial and error to determine the correct formula. Printing with laser-adaptive inks requires a long drying and curing time. The printed sheets usually printed on the offset press will take 24 to 72 hours to be printed on the digital press. In the offset printing process, you should also pay attention to reducing the amount of powder spraying as much as possible, because digital printing machines are very sensitive to this.
From the requirements of paper humidity, offset printing and digital printing are almost contrary. Digital printing is particularly sensitive to excessive moisture. Drying and curing are the key factors affecting the quality of printed sheets. Experts have recommended the minimum ink density and maximum fountain solution dosage in the offset printing process, which will effectively prevent the paper from curling and wrinkling during digital printing.
The maintenance of the paper cutter is very important. The sharp blades can reduce paper wool and paper scraps. Too much paper wool will cause the motor of the digital printing machine to overheat. The paper wool may also stick to the graphic part of the printed sheet, affecting the product quality. In addition, the lifting height of the cutter should be as small as possible to prevent the paper on the top from being brought under the knife holder. At the same time, it is necessary to ensure the balance of the paper stack. It is recommended that the printed sheets printed by the offset press be stored for half a day before being processed for digital printing or cutting.
When storing printed materials, avoid over-tightening the package and prevent the edges of the paper from curling. If time permits, it is best to put the printed matter on for about 10 days, and then use it after the ink is fully cured. The ideal storage environment for printed products is 50% relative humidity and 39 ° C ambient temperature.
Sunshine packaging supplys a variety of Gift Packaging, such as festive
and holiday gift packaging , luxury gift box, colorful gift wrap, strudy but
pretty gift box.
With more than 20 years of experience, Sunshine packaging has been accepted by
worldwide clients.