Using the technique of water-based ink printing corrugated paper

Water-based ink used in printing of corrugated paper, abroad for quite a long time, domestic also has for more than 20 years. Corrugated paper printing is by stamping (embossed), offset printing (flat), rubber version of the water can wash the printing, water-based ink was developed into today's flexible letterpress printing. Flexible letterpress water-based ink in the maleic acid modified rosin - tree also refer to acrylic resin (low) to (high). Printing plates from rubber version of the transition to a resin version. Printing machine also from the big stick of monochrome or two-color machine gradually developed into the three color or four color ELEXO machine. From 150 ~ 200 mesh round metal roller gradually developed to 180 ~ 250 purposes of ceramic roller. With the changing of printing technology, water-based ink use skills is very important. Before the author discusses the use of water-based ink skill, we must first understand the characteristics and printing of the water-based ink and the relationship between various factors, such as plate, paper, mesh wheel factors, mechanical factors, ink painting, operators, etc. 1. The characteristics of the corrugated paper printing using water-based ink Water-based ink to divided into two categories: (1) - maleic rosin modified resin series (low); (2) acrylic resin series (high). 2. The requirement of water-based ink 1) long stored after precipitation, after classics agitate should be very easy to disperse; (2) to have good flow properties and viscosity; 3. Good storage stability; (4) drying performance faster and appropriate; 5. Can't have any bad effects on the plate and press; 6. Can't have too big excitant odour. 3. Water-based ink technology parameters (1) color: with the standard approximation (note: the test samples and standard sheet nearly not connected with the manual show the color wheel show color contrast). (2) the fineness: less than 20 um, instrument: 0 ~ 50 um scraper fineness meter; (3) viscosity: 20 + 5 s, equipment: RIGOSHA4 # cup (25 ℃); (4) PH value: 8.0 ~ 9.5 instrument: portable PH meter (PHB - type 2); The heavy metal content (5) : world packaging green environmental protection standard; 6. The patient: meets the requirements. 4. Proper use of water-based ink 1) before use must be fully mixing, maintain uniform ink composition; (2) open after use to save the ink should be immediately sealed closed well, in case of dust falling and dry solid crust; (3) more than ink containing impurities should first filter, along with new ink use; (4) please avoid close to high temperature during storage or sun exposure, stored under normal conditions are for more than a year without metamorphism; (5) that the application of ink viscosity is larger, can add a moderate amount of water.