Interns want to find a printing factory in Yantai to study Heidelberg printing machine.

1. ink. At present, traditional solvent-based inks are widely used in printing industry, mainly including aromatic hydrocarbons, esters and other organic solvents, most of which are toxic, which will pollute the environment and affect workers' health; Organic solvents are flammable and explosive, which has hidden dangers in production safety. 2. fountain solution. Alcohol dampening system is widely used in offset press. Isopropanol is one of the additives of fountain solution, and the alcohol vapor produced after volatilization is toxic and will have harmful effects on human health. 3. Film and waste fixing solution. They all contain a lot of silver ions. If these substances directly enter the environment, heavy metal silver ions will pollute natural water bodies and cause harm to the environment. At the same time, the membrane base is a polymer compound, which is extremely difficult to degrade in the environment and is not easy to pollute the soil. 4. Plastic coating. Plastic film mulching cannot be degraded into white pollution, and the paper covered with plastic film cannot be recycled, resulting in waste of resources. At the same time, the use of toxic volatile solvents such as toluene and natural water in the process of film mulching will endanger workers' health and pollute the environment. 5. For oily glazing materials, the diluent used is mainly toluene. Inhalation of a certain amount will lead to pathological changes of respiratory system and blood system. In addition, printers should eat more milk fungi and other foods to benefit their health.

The main pollutants in ink are heavy metals, including lead, chromium, cadmium and mercury. , may cause certain harm to the human body. For example, lead can not only hinder the formation of human blood cells, but also enter brain tissue through blood, causing brain damage. When the lead in the body accumulates to a certain extent, mental disorders, nightmares, insomnia, headaches and other chronic poisoning symptoms will appear. In addition, the ink used in newspaper printing usually contains toxic organic solvents, such as ethanol, isopropanol, toluene and xylene. Although these organic solvents will eliminate most of the hazards after drying, the residual parts will still pose potential dangers to the human body. Especially for newspaper color pages, the inking area is large, the ink layer is thick, and the residue of organic solvents will be more. If inhaled for a long time, it may affect the central nervous system of the brain and cause great harm to health. The harm of organic solvents will be obvious in new newspapers, so don't use new newspapers to cushion the table. -It is easy to age prematurely, which is also very irritating to the stomach and harmful to the physiology. Generally speaking, working for one or two years will not do much harm, but it will do great harm to the body for a long time. There are many heavy metals in the ink. The pungent smell you usually smell is also harmful, containing a lot of lead, chromium, cadmium and mercury, which can be contacted through the skin. The respiratory tract will enter the human body. Long-term contact can cause poisoning. I suggest you don't engage in this job for a long time, you can adjust it. Certain protective measures should be taken at work.