As we all know, the main body of the world printing industry is offset printing. Offset printing ink is transferred to the substrate through ink rollers, blankets, etc. The ink roller and blanket are durable goods. To ensure its normal operation, regular cleaning and maintenance are very important. This includes Three kinds of cleaning: routine cleaning after printing every day; changing color before cleaning ink; regular thorough maintenance cleaning. In this sense, ink cleaning is a very important project for printing companies. In addition, the ink cleaning agent is a very large amount of printing consumables. According to the truth, printing companies should attach great importance to the procurement and selection of ink cleaning agents, but the current facts Yes, a large number of printing companies partially or completely use gasoline and kerosene as ink cleaning agents. According to a survey, even in Beijing where the printing industry is relatively developed, almost none of the printing companies totally abolishes the use of gasoline and kerosene cleaning presses.
In fact, printing companies are very clear about the possible adverse effects of the use of gasoline and kerosene. However, due to factors such as the wide range of sources of gasoline, kerosene, and the fast drying speed, the relatively low prices make printing companies unable to refuse. These advantages are particularly outstanding when compared to ink cleaners available on the market: Ink cleaners have specific conditions for specific presses, blankets, rollers, etc.; special ink cleaners are expensive; supply Nor can it be guaranteed to be completely timely.
Let off steam and kerosene
1. The effect is not good
Although the use of gasoline and kerosene for the conventional cleaning of rubber rollers and blankets is very convenient and the results are satisfactory, gasoline and kerosene cannot do anything about the water-soluble components such as paper wool, paper powder, and gum arabic that are attached to the rubber roller. A variety of impurities layered on the surface of the roller, it will close the original capillary pores on the surface to form a smooth crystalline layer, so that the roller size changes, severely affect the printing pressure, ink roller transfer performance decline , resulting in printing "meat bar", "flat net hair" and other printing failures. At the same time, a large amount of aromatic compounds contained in gasoline and kerosene can also cause the rubber to swell, affecting printing pressure and printing quality.
2. Security risks
Gasoline and kerosene are extremely flammable liquids, and the flash point (ie, the temperature at which the steam encounters an open flame) is only twenty degrees. If the ventilation facilities in the printing plant are not good, a dangerous situation such as a fire accident is likely to occur; As a result, many printing companies have exploded when workers use gasoline cleaning presses.
3. Adverse environmental protection
Gasoline and kerosene contain a large amount of VOCs, causing serious environmental pollution and failing to meet environmental safety standards and causing greater harm to the health of employees. At the same time, most printing companies will use ink and kerosene to clean the ink directly.
All of them fell into the sewers. Needless to say, the pollution of soil and water quality, and the gasoline floating on the water at the same time, 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, various countries in the world have started to formulate various regulations and standards for ink cleaning agents (car wash water) since 1995. These mainly include: Ink cleaning agents with a flash point of less than 21°C. Cannot be used for the cleaning of printing rollers and blankets (such as gasoline); can not supply and use solvents containing halogenated alkane terpenes (turpentine), n-hexane, imines or acid amines; the content of aromatic compounds in solvents 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, will rigorously test and regulate the use of chemicals on their printing equipment. Heidelberg, for example, has been rigorously tested to provide 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 the ISO9001 quality management system certification and ISO14001 environmental management system certification in accordance with the requirements, and naturally prohibit the use of gasoline and kerosene as ink cleaning agents.
If printing companies used gasoline and kerosene in the past as a common choice to expand profits, then in today's increasingly fierce competition in the printing industry, only using the cost of materials and the use of gasoline and kerosene to clean inks is indeed a stare. This is because it has significantly affected the social benefits and overall economic benefits of the printing industry.
With the large number of imported high-end printing equipments being put into use, as well as the security and environmental protection awareness of the printing company operators, environmental-friendly ink cleaners (car wash water) will become the main cleaning solvent for the rubber rollers in the future.
Learn about ink cleaners
In fact, the current purpose of various ink cleaning agents on the market is to wash off impurities such as inks. In the printing process, many impurities of ink, water, and printing materials can be roughly divided into two types: one is a soluble type, That is, it is soluble in organic solvents, such as inks, resins, colloidal oils, waxes, binders, and acidic and alkaline substances in the components of inks and auxiliaries; the other is water-soluble, ie soluble in water or Water has affinity, such as gum arabic, casein, paper, paper powder, fillers and other inorganic compounds and hydrophilic pigments.
In fact, printing companies are very clear about the possible adverse effects of the use of gasoline and kerosene. However, due to factors such as the wide range of sources of gasoline, kerosene, and the fast drying speed, the relatively low prices make printing companies unable to refuse. These advantages are particularly outstanding when compared to ink cleaners available on the market: Ink cleaners have specific conditions for specific presses, blankets, rollers, etc.; special ink cleaners are expensive; supply Nor can it be guaranteed to be completely timely.
Let off steam and kerosene
1. The effect is not good
Although the use of gasoline and kerosene for the conventional cleaning of rubber rollers and blankets is very convenient and the results are satisfactory, gasoline and kerosene cannot do anything about the water-soluble components such as paper wool, paper powder, and gum arabic that are attached to the rubber roller. A variety of impurities layered on the surface of the roller, it will close the original capillary pores on the surface to form a smooth crystalline layer, so that the roller size changes, severely affect the printing pressure, ink roller transfer performance decline , resulting in printing "meat bar", "flat net hair" and other printing failures. At the same time, a large amount of aromatic compounds contained in gasoline and kerosene can also cause the rubber to swell, affecting printing pressure and printing quality.
2. Security risks
Gasoline and kerosene are extremely flammable liquids, and the flash point (ie, the temperature at which the steam encounters an open flame) is only twenty degrees. If the ventilation facilities in the printing plant are not good, a dangerous situation such as a fire accident is likely to occur; As a result, many printing companies have exploded when workers use gasoline cleaning presses.
3. Adverse environmental protection
Gasoline and kerosene contain a large amount of VOCs, causing serious environmental pollution and failing to meet environmental safety standards and causing greater harm to the health of employees. At the same time, most printing companies will use ink and kerosene to clean the ink directly.
All of them fell into the sewers. Needless to say, the pollution of soil and water quality, and the gasoline floating on the water at the same time, 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, various countries in the world have started to formulate various regulations and standards for ink cleaning agents (car wash water) since 1995. These mainly include: Ink cleaning agents with a flash point of less than 21°C. Cannot be used for the cleaning of printing rollers and blankets (such as gasoline); can not supply and use solvents containing halogenated alkane terpenes (turpentine), n-hexane, imines or acid amines; the content of aromatic compounds in solvents 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, will rigorously test and regulate the use of chemicals on their printing equipment. Heidelberg, for example, has been rigorously tested to provide 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 the ISO9001 quality management system certification and ISO14001 environmental management system certification in accordance with the requirements, and naturally prohibit the use of gasoline and kerosene as ink cleaning agents.
If printing companies used gasoline and kerosene in the past as a common choice to expand profits, then in today's increasingly fierce competition in the printing industry, only using the cost of materials and the use of gasoline and kerosene to clean inks is indeed a stare. This is because it has significantly affected the social benefits and overall economic benefits of the printing industry.
With the large number of imported high-end printing equipments being put into use, as well as the security and environmental protection awareness of the printing company operators, environmental-friendly ink cleaners (car wash water) will become the main cleaning solvent for the rubber rollers in the future.
Learn about ink cleaners
In fact, the current purpose of various ink cleaning agents on the market is to wash off impurities such as inks. In the printing process, many impurities of ink, water, and printing materials can be roughly divided into two types: one is a soluble type, That is, it is soluble in organic solvents, such as inks, resins, colloidal oils, waxes, binders, and acidic and alkaline substances in the components of inks and auxiliaries; the other is water-soluble, ie soluble in water or Water has affinity, such as gum arabic, casein, paper, paper powder, fillers and other inorganic compounds and hydrophilic pigments.
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