The important role of ink cleaning agent in printing production
In fact, printing companies are very aware of the possible adverse effects of using gasoline and kerosene, but the wide range of sources of gasoline and kerosene, fast drying, and relatively low prices make printing companies unable to refuse. These advantages are particularly prominent compared to the ink cleaners available on the market: ink cleaners have specific conditions for specific presses, blankets, rubber rollers, etc.; special ink cleaners are expensive; Nor can it be guaranteed to be completely in time. Let gasoline and kerosene go to class The use of gasoline and kerosene cleaning inks has the following disadvantages. (1) Poor performance Although the use of gasoline and kerosene for the normal cleaning of rubber rollers and blankets is very convenient and the results are satisfactory, gasoline and kerosene have no effect on the water-soluble components such as paper wool, paper powder and gum arabic attached to the rubber rollers. A layer of various impurities is deposited on the surface of the rubber roller, which will close the original capillary pores on the surface of the rubber roller to form a smooth crystal layer, which will change the size of the rubber roller, seriously affect the printing pressure, and the ink transfer performance of the ink roller will decrease. It causes printing problems such as "ink bar" and "flat net hair" during printing. At the same time, a large amount of aromatic compounds contained in gasoline and kerosene will also swell the rubber, affecting printing pressure and printing quality. (2) Security risks Gasoline and kerosene are extremely flammable liquids. The flash point (that is, the temperature at which steam explodes in an open flame) is only 20 degrees. If the ventilation facilities in the printing plant are not good, it is easy to cause dangerous situations such as fire accidents. As a result, many printing companies have exploded when workers use gasoline to clean presses. (3) Unfavorable environmental protection Gasoline and kerosene contain a large amount of VOC, which is seriously polluted by the environment, does not meet environmental safety standards, and is harmful to employees' health. At the same time, most printing companies will use the method of direct discharge of steam and kerosene that have been cleaned. All of them are poured into the sewers, and there is no need to say that the pollution of the soil and water quality, while the gasoline floating on the water surface, there is also the danger of explosion in the season when the outdoor temperature is relatively high. (4) Market elimination In order to better promote the development of the printing industry, countries around the world have started to develop various regulations and standards for ink cleaning agents (car wash water) since 1995, which mainly include: ink cleaning agents with flash points below 21 °C. Cannot be used for the cleaning of printing rollers and blankets (such as gasoline); solvents for alkane terpenes (turpentine) containing halogenated groups, n-hexane, imine or acid amines; and aromatic compounds in solvents It should be less than 0.1%; the content of toluene and xylene in the solvent should be less than 10%. At the same time, many printer manufacturers, especially high-end printing equipment manufacturers, are rigorously testing and specifying the chemicals used on their printing equipment. As Heidelberg has rigorously tested, there are three types of car wash water that can be used on Heidelberg presses: Bottcherin 60, Superdot and Varn. In order to undertake international business, some printing companies must pass ISO9001 quality management system certification and ISO14001 environmental management system certification according to requirements. It is naturally prohibited to use gasoline and kerosene as ink cleaning agents. If in the past, printing companies used gasoline and kerosene as a universal choice to expand profits, then in today's increasingly fierce competition in the printing industry , it is indeed a kind of eye-catching use of gasoline and kerosene to clean ink only by considering the material cost at present. This is because it has significantly affected the social and overall economic benefits of the printing industry. With the large-scale import of high-end printing equipment and the enhancement of the safety and environmental awareness of printing companies, environmentally friendly ink cleaning agents (car wash water) will become the mainstream cleaning solvent for rubber rollers in the future. Straw Bags,Straw Tote Bag,Loewe Straw Bag,Round Straw Bag GUANGZHOU KOBE LEATHER CO.,LTD , https://www.kobebags.com