Green environmental protection is one of the hottest topics in printing industry in recent years.

  from January 2018, “ environmental protection tax ” the release of the May 2018 "application for emission permits and the printing of technical specification printing industry" issued by the national environmental protection standards. With the continuous regulation of pollutant discharge fees from the legislative level, green printing has been an inevitable trend in the domestic market.

 , as a technology pioneer in offset printing equipment and printing materials, it has been promoting the development of domestic printing technology as its own task for many years, actively advocating and vigorously promoting the practical application of green printing materials and green printing technology in printing enterprises. It also promotes the green printing technology by inviting experts and scholars from domestic printing professional institutions to write.

  in response to the development trend of green printing, it is found that the printing enterprises are implementing green printing, improving the printing process, designing the difficult and painful points and problems in the suitable green printing solutions to their own situation. We have special columns and published wonderful articles and knowledge from experts. Look back and share it.

Green printing hall

 , in particular, we focus on the key and difficult points in the implementation of the printing enterprise's green printing, and talk about the process, the material and the technology, hoping to help the enterprise to upgrade the green printing.

Green printing hall 1:

Application and key points

 , in traditional offset printing, in order to make the water film formed smoothly, it is generally used to moisten the plate system. It is necessary to add alcohol in the wetting solution (mainly isopropanol and IPA etc.). The effect is to reduce the tension of the liquid surface, which is beneficial to the diffusion of the hydrophilic part of the plate and forming a qualified water film in the high speed printing. At the same time, the effect of cooling and cooling is improved.

But the problem of using alcohol (Yi Bingchun) to moisten the plate is also obvious, such as the rapid evaporation of alcohol, resulting in the volatilization of 40% of the alcohol in the wetting solution, which can actually play a limited role in alcohol; isopropanol will be decomposed at high temperature and inhalation of excessive isopropanol vapour will have a harmful effect on human health; isopropanol is low boiling point. High volatile flammable organic solvents. The vapor concentration of 2-12% in the closed space can cause an explosion and a fire source may cause a tempering; isopropanol is a photochemical oxidant that forms ozone after sunlight, forms a photochemical smog, stimulates human eyes and respiratory systems, endangers human health and plant growth, and pollutes the environment with isopropanol emissions. Therefore, isopropyl alcohol is a kind of chemicals which are harmful to the environment and personnel. Reducing its consumption in printing is an inevitable trend of green environmental protection.

  with the deepening of the concept of environmental printing and green printing and the increasing price of alcohol, more and more printing enterprises have used the new technology and new technology in the printing process to use the &ldquo that does not need to add alcohol, and the alcohol free version of &rdquo. Alcohol free version is the use of other non-toxic chemical components instead of alcohol or isopropanol, the advantage is to basically solve or reduce a series of problems brought by the alcohol embellish solution, so that the printing process becomes more economic, safe and environmental. Of course, according to the current offset technology, printing enterprises often can not achieve a complete “ alcohol free version of ” printing, more use of “ reducing alcohol to run the version ” gradually reduce the amount of alcohol in the run plate, so that the operating workers and offset technology gradually adapt to and finally realize “ free alcohol to run the edition Liquid ” printing. Many printing enterprises have gradually realized the printing of alcohol reducing fountain solution by this way, and achieved good results.

  the use of high quality free (subtractive) alcohol wetting solution effectively reduces the amount of isopropanol (alcohol), and the proportion of alcohol generally is between 2-3%, which can significantly reduce the cost of production; the pH value of the alcohol reducing solution can be reduced to 4.8 - 5..3, which is more suitable for different paper printing conditions, the stability of the alcohol moistening plate is high, the balance of ink and ink can be reached quickly and the rate of printing waste can be reduced; the alcohol moistening plate has excellent wetting effect, and it can ensure the stability of the printing quality and be more suitable for the CTP plate. It has the function of protecting the printing plate; the alcohol reducing fountain solution can reduce the accumulation of paper powder on the surface of the roller and extend the cleaning interval.

 , but it is not so easy to use the alcohol free printing process. In actual production, there will be a series of unforeseen problems. It is necessary to adjust the original alcohol embellish system and the wetting process, such as:

  carefully adjust the surface tension of the free (subtractive) alcohol embellish plate so that the surface tension is the same as that in the use of alcohol printing. Generally, the surface active agent or surface active additive is used to solve it.

  adjust the viscosity of the free (reducing) alcohol moistening solution, avoid the change of viscosity, break the original delicate ink balance, and cause undesirable consequences. The adjustment method is to cool the fountain solution to increase the viscosity, and the two is to adjust the pressure between the rubber water rollers, which helps the fountain printing system provide more fountain solutions.

  adjust the water roller in the moistening system, select the water roller which can directly use the alcohol free fountain solution, so as not to affect the use of free (reducing) alcohol fountain solution.

  the cost of fountain solution accounts for a very low proportion of the total printing cost, usually 0..5-1%, but the use of high quality free (subtractive) alcohol embellish tablets can reduce the cost of many aspects of the printing system, especially the paper cost of the largest printing cost, thus reducing the overall printing cost. The appearance of the alcohol reducing liquid is fully conformed to the development direction of green environmental protection printing, that is, high speed, high quality, low consumption, low pollution and low cost. Its advanced nature is gradually getting the recognition of the people in the industry, and it will set off a new round of green environmental protection and high quality and high efficiency Printing Revolution.

Green printing materials recommend

  Man Roland Inc provides an alcohol free printing solution, in addition to the core reduction / alcohol free version, at the same time, at the same time in the rubber roll maintenance, the deep water tank cleaning, wet plate filtrate and other aspects of the supporting products and services, through the full range of technical support, let customers push the green color printing more smoothly.

  &ldquo of Maryland; perk series reduction / alcohol free version ” (S221E/S222E/S235B model), providing a variety of formulations, combined with the production environment and water quality of different users, can quickly reach the ink balance, not only have excellent wetting effect and prevent the deposition of calcium and magnesium, but also have the protection of corrosion protection. The function ensures the stability of printing quality and is more suitable for the use of UV printing and CTP printing plate.

  the amount of isopropanol (alcohol) in PDE Kang series reduced / no alcohol solution is recommended as 0~5%. It can effectively reduce the amount of isopropanol and is suitable for printing without total isopropanol, saving cost. Therefore, high quality &ldquo, Pu de Kang &rdquo, fountain solution is the first choice product in your printing production, and it will bring considerable economic benefits to you.