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; Ink contains many chemicals, and the organic solvents that are often used are ethanol, isopropanol, butanol, propanol, butanone, ethyl acetate, butyl acetate, toluene, xylene and so on. Although most of these organic solvents will volatilize after drying, the solvent before volatilization and the residue after volatilization will still cause harm to human body. Especially for printed matter with large inking area and thick ink layer, there are many residual solvents, and the toxic substances released during use will pollute the air and endanger human health. Another big problem is the pigment in ink. These pigment particles are very fine, have strong adsorption capacity, and contain heavy metal elements such as lead, chromium, cadmium and mercury, all of which have certain toxicity. When the lead in the human body accumulates to a certain extent, there will be symptoms of chronic poisoning such as insanity, nightmare, insomnia and headache, and in severe cases, there will be symptoms such as fatigue, loss of appetite, nausea, abdominal distension, abdominal pain and diarrhea. Lead can also enter brain tissue through blood, causing brain damage. Lead poisoning has a great influence on children's intelligence. Occupational chronic benzene poisoning-early symptoms such as dizziness, headache, fatigue, insomnia, and memory loss often occur in poisoned people; There will be pancytopenia, aplastic anemia or myelodysplastic syndrome in the later stage, and even leukemia in severe cases.
Some inorganic pigments contain heavy metal elements, such as lead, chromium, copper and mercury. , have a certain degree of toxicity. These cannot be used for printing on food or children's toys. When choosing ink, try to choose ink with high heavy metal content and low cost.
Secondly, organic solvents can also cause harm to human body. Long-term contact will make the skin rough. If it penetrates into the skin or blood vessels, it will harm people's blood cells and hematopoiesis with blood. Organic solvents are an important part of all kinds of inks, which can dissolve natural resins and synthetic resins, otherwise all inks are inevitable, so you must wear gloves when mixing or contacting inks.
Whether it is offset printing, gravure printing, letterpress, or the ink of the printer used in our home, it is more or less toxic, so everyone must wear gloves when touching ink.