What is the green ink

Ink does not contain aromatic hydrocarbons, in line with ROHS standard can be called green ink; soybean oil-based ink, belonging to environment-friendly ink; ink low VOC (volatile organic compounds) VOC<1% is environment-friendly ink; not containing petroleum solvent ink is much more environmentally friendly ink. Now, market marked "a lot of environmental protection type" the words of the ink products, but there is no clear definition of environmental friendly ink, actually in the rapid development of society, very difficult to make an appropriate definition of, as long as they in a way of environmental protection made new contributions, said it is environmentally friendly ink is also beyond reproach.

Then, a study on the ink products are environmentally friendly, what are the specific indicators can refer to? I think we can proceed from the following aspects.

The content of 1 heavy metals

Main sources of heavy metals in ink pigments and additives, although now most of the ink have reduced the content of heavy metal, but there are enterprises choice with chrome, chrome red to create a risk of ink.

2 aromatic hydrocarbon solvent

The main nail benzene, xylene, polycyclic aromatic hydrocarbons and their derivatives. They will be accompanied by dry volatile ink into the air, not only pollute the atmosphere, but also pose a threat to the health of workers of printing.

3.VOC

Many kinds of volatile organic compounds, such as alcohols, esters, ethers, ketones, mineral oil etc.. With aromatic hydrocarbon solvent, it will be accompanied by ink drying and evaporation, and air pollution.

Environmental protection is a relative concept, with the continuous progress of science and technology, human understanding to the environment and the requirements are also getting higher and higher, the measures of environmental protection has been strengthened, so the emergence of the many environmentally friendly ink products.

Types of environmentally friendly inks

2006, the author will be offset printing ink in accordance with the order of time is divided into four generations of environmental protection products, after a lapse of less than a year, and now has a new generation of products, we will determine the fifth generation of environmentally friendly products.

1 first generation of environmentally friendly products - heavy metal standard ink

The earliest by the German put forward, because children are often printed with ink toys imported in chewing, the existence of the possible involvement of heavy metals, therefore, people began to heavy metal content of ink request of printing ink put forward eight indicators of heavy metals in the limit.

RoHS involving the heavy metal index, now majority of offset printing ink products are able to meet the relevant standards, but cannot be completely ruled out a low grade, low price offset printing ink contains the possibility of a large number of heavy metals. Heavy metals will remain in the printed matter, even if the waste will cause pollution to the environment.

Second 2 generation environmentally friendly products - non aromatic (AF) solvent based inks

Ordinary traditional offset printing ink solvent is mineral oil and high aromatic hydrocarbon content of some mineral oil and its volatile will air pollution of the printing shop, print (books, magazines, newspapers, packaging) in use process will be slow release of petroleum solvents, hazardous to health.

High grade ink basically uses the mineral oil without aromatics.

Third 3 generation environmentally friendly products - low VOC ink (VOC<1%)

Low VOC ink on air pollution and its tiny, is an outstanding environmental protection products, its contribution to the environmental protection of more than water-based ink and UV ink. The use of low VOC printing ink products even if the waste can be safely recycled, even if not recycled, it is in the nature of the decomposition than other printing ink prints more easily. Can be regarded as the 2006's most environmentally friendly ink products.

There is such a case, a brand of printing ink products marked components are as follows: aromatic components%; petroleum solvent composition 30; VOC components%. This product marked containing petroleum based solvents, and marked VOC<1%, meaning is that it contains petroleum solvent is not to volatile organic compounds, on the surface, it on the air pollution is minimal, is a good environmental protection product. Then, it contains no volatile solvent oil? It can always stay in print? Perhaps, through the introduction, we can find some answers.

At present, the international definition of VOC are various: the United States Environmental Protection Agency (EPA) is defined as: volatile organic compounds is defined in the CO, CO2, H2CO3, metal carbides, metal carbonate and ammonium carbonate, any can participate in the photochemical reaction of carbon compounds.

The ASTM D3960-98 standard defines VOC as any can participate in photochemical reactions of organic compounds.

In 1989, the World Health Organization (who) of total volatile organic compounds (TVOC) are defined: total volatile organic compound that has a lower melting point than the room temperature, and boiling point between 50 ~ 260 DEG C volatile organic compounds collectively.

International standard ISO4618/1-1998 paints and varnishes - General terms on the definition of VOC is, in principle, under the normal temperature, any free volatile organic liquid (or solid) and.

The definition of the German DIN 55649-2000 standard for VOC is that under normal pressure, any normal boiling point of organic compounds or the initial boiling point is less than or equal to 250 DEG C.

Obviously, containing petroleum solvent and VOC<1%'s products, quoted by the WHO and the German DIN 55649-2000 standard.