Solvents in ink cannot be seen

Solvent-based inks account for more than 55% of printing applications, while the amount of solvent used for inks is said to be second only to coatings.

Solvent is an important part of solvent-based inks. Its solubility, hydrogen bonding, and volatilization rate directly affect the quality and use of inks, but at the same time it is a major hazard to human health.

The solvent in the ink will continuously evaporate, especially when the ink is formed into film. It will not only waste resources but also pollute the environment and directly endanger the physical and mental health of operators. Therefore, many countries impose restrictions on the amount of solvent used in inks. For example, the United States regulates that organic solvents must not exceed 25%. Researchers are actively developing solvent-free or solvent-free printing inks.

In recent years, the author has conducted surveys on 300 companies in four provinces and cities and found that nearly 70% of the companies only pay for ink consumption and rarely notice the harm of solvents. Individual companies in the ink organic solvent added to reach 7:1, but the employee's labor protection is a serious shortage, which is the problem that should be resolved as soon as possible. So, how can we use solvent-based ink and reduce the harm to operators? The author believes that enterprises should do a good job of protection work in strict accordance with the relevant provisions of the labor department. The specific measures are:

First, to strengthen health and security precautions: packaging and printing industry employees in the workshop or plant area of ​​health and protective conditions are different, the sensitivity is not the same, but must strengthen ventilation, to prevent the indoor toxic substances beyond the allowable concentration range, but can not be discharged Liquids and solids. The manager of the enterprise must also establish and improve the responsibility system for production posts. The contents include: (1) the method for determining the operation process; (2) the management requirements for the use of labor protection products; (3) the requirements for the power supply and protection of explosion-proof equipment; (4) the inspection of test waste water and waste dust (objects) Discharge location processing; 5 Exhaust, ventilation azimuth; 6 Specification of flammable, explosive, toxic warning signs and instructions; Establishing location; 7 Regular requirements for safety education.

2. Strictly abide by the pre-production and various requirements: Safe posts, such as wearing a hat, glasses, gloves, work clothes, boots, plastic aprons, and even protective masks. Selection of operating tools, inspection of power supply, scheduling of machinery, because the ink production, printing process, cleaning version, roller dilution solvent are mostly corrosive vapors, amine gas, curing agent, dilute agent and ink splash, volatile may cause Short-term or lifetime damage - breathing, esophagus, brain nerves, kidneys, stomach, liver, vision system, and skin urgency and chronic diseases.

Third, the ink manufacturing: mixing, thinning, additives, color adjustment, cleaning plate ink roller operation, pigment, solvent and low-viscosity mixing additives scattered sprinkled. If evaporated, volatile substances such as the eyes should immediately rinse with distilled water into the eyes.

Fourth, to strengthen health protection measures: After the skin is contaminated, first wipe with an ink cleaning agent that can dissolve the stain, then use soap and washing powder to neutralize and wash, and then wash it with water. The esophagus system and the gastrointestinal system are mildly sterilized by oral administration of honey and vinegar, and severe poisoning should be sought for hygiene treatment.

5. The parts that are most likely to be contaminated during production must be protected: no contact with resins, inks, solvents (including thinners) is allowed at any time and in any place. The simplest method of protection is as follows: hand, arm, face, neck, and foot should be coated with a barrier ointment or liquid protective liquid, dip coated production rub, it is best to wear the top cover, rubber gloves, aprons.

VI. Clean up the working environment in time: In order to prevent contamination of labor protection equipment, machinery, floors and tables, ink marks should be promptly removed. The solvent used should be non-toxic or slightly harmful (such as ethanol, acetone, ethyl acetate, etc.). Solutes or substances, and then use emulsifiers, soap, water removal is appropriate, and there should be multiple sets of work clothes as a replacement to prevent contamination of the skin.

Seven, to strengthen personal protection: in the dissolved resin to adjust the ink, dilution printing, cleaning version, roll, etc. to prevent harmful solute through the pores of the skin to penetrate freely into the human body. For example, the deposition of excessive amounts of acidic harmful substances can lead to declining renal function, even renal failure, and reduce life expectancy. When the skin is contaminated, it is first washed with water and then washed in warm water with soap and washing powder. It can also be washed with detergent or sand. If it cannot be washed out, use a low-toxic mixed solvent. If acetone is added to the ethyl ester to remove the spray or use cotton sand or absorbent cotton, gently scrub the dirty place with no pressure and rinse it with water.

Eight, pharyngitis is also caused by the pollution of ink manufacturing and printing process, and is very common. When the symptoms of gastric nerve disorders appear, Oryzanol can also be used to adjust the mechanism of gastric nerve tissue or follow the doctor's advice. There are also skin rashes after the elimination of acute symptoms, but also to continue to do a follow-up treatment, and for effective protection and safety and health, we must all know that ink in the manufacturing, printing, cleaning process will be due to differences in solvents, solute and physical fitness The difference, damage to items, operational contact, determines the speed and severity. Replacing jobs is just the next step in the measure.

9. In order to eliminate and prevent hidden accidents, it is necessary to carry out management education of scientific knowledge: the occurrence of burning and explosion accidents bring irreparable losses and regrets to the country, enterprises, society, and individuals. Safety for production, production must be safe, more for the sake of human civilization and development, and always keep a clear head, from the ink production, printing process, cleaning process, every link, grab a ring, that is, from me Start.

X. The security measures should include:

(1) Design devices for workshops and warehouses;

(2) Explosion-proof conditions for water, especially power supplies;

(3) container leakage seal requirements;

(4) Configuration maintenance of production machinery, fire-fighting equipment and medical facilities;

(5) Ventilation and convection of workshop air (exhaust window);

(6) Classification of warehouse storage items;

(7) Temperature and humidity (18~25°C, 65±5%) regulation and control of workshops and warehouses;

(8) Detection and control of excessive substances in the ink system and printing process;

(9) emission orientation of fire, exhaust, and waste;

(10) Signing the transfer procedure of the operation process;

(11) The fire restrictions on smoking and accidents in factories and offices are prohibited;

(12) Harmful and toxic materials are selected for use and transportation and storage limit line;

(13) the establishment of warning signs identification cards;

(14) regular exchange training and irregular inspection and evaluation;

Solvent-based inks account for more than 55% of printing applications, while the amount of solvent used for inks is said to be second only to coatings.

Solvent is an important part of solvent-based inks. Its solubility, hydrogen bonding, and volatilization rate directly affect the quality and use of inks, but at the same time it is a major hazard to human health.

The solvent in the ink will continuously evaporate, especially when the ink is formed into film. It will not only waste resources but also pollute the environment and directly endanger the physical and mental health of operators. Therefore, many countries impose restrictions on the amount of solvent used in inks. For example, the United States regulates that organic solvents must not exceed 25%. Researchers are actively developing solvent-free or solvent-free printing inks.

In recent years, the author has conducted surveys on 300 companies in four provinces and cities and found that nearly 70% of the companies only pay for ink consumption and rarely notice the harm of solvents. Individual companies in the ink organic solvent added to reach 7:1, but the employee's labor protection is a serious shortage, which is the problem that should be resolved as soon as possible. So, how can we use solvent-based ink and reduce the harm to operators? The author believes that enterprises should do a good job of protection work in strict accordance with the relevant provisions of the labor department. The specific measures are:

First, to strengthen health and security precautions: packaging and printing industry employees in the workshop or plant area of ​​health and protective conditions are different, the sensitivity is not the same, but must strengthen ventilation, to prevent the indoor toxic substances beyond the allowable concentration range, but can not be discharged Liquids and solids. The manager of the enterprise must also establish and improve the responsibility system for production posts. The contents include: (1) the method for determining the operation process; (2) the management requirements for the use of labor protection products; (3) the requirements for the power supply and protection of explosion-proof equipment; (4) the inspection of test waste water and waste dust (objects) Discharge location processing; 5 Exhaust, ventilation azimuth; 6 Specification of flammable, explosive, toxic warning signs and instructions; Establishing location; 7 Regular requirements for safety education.

2. Strictly abide by the pre-production and various requirements: Safe posts, such as wearing a hat, glasses, gloves, work clothes, boots, plastic aprons, and even protective masks. Selection of operating tools, inspection of power supply, scheduling of machinery, because the ink production, printing process, cleaning version, roller dilution solvent are mostly corrosive vapors, amine gas, curing agent, dilute agent and ink splash, volatile may cause Short-term or lifetime damage - breathing, esophagus, brain nerves, kidneys, stomach, liver, vision system, and skin urgency and chronic diseases.

Third, the ink manufacturing: mixing, thinning, additives, color adjustment, cleaning plate ink roller operation, pigment, solvent and low-viscosity mixing additives scattered sprinkled. If evaporated, volatile substances such as the eyes should immediately rinse with distilled water into the eyes.

Fourth, to strengthen health protection measures: After the skin is contaminated, first wipe with an ink cleaning agent that can dissolve the stain, then use soap and washing powder to neutralize and wash, and then wash it with water. The esophagus system and the gastrointestinal system are mildly sterilized by oral administration of honey and vinegar, and severe poisoning should be sought for hygiene treatment.

5. The parts that are most likely to be contaminated during production must be protected: no contact with resins, inks, solvents (including thinners) is allowed at any time and in any place. The simplest method of protection is as follows: hand, arm, face, neck, and foot should be coated with a barrier ointment or liquid protective liquid, dip coated production rub, it is best to wear the top cover, rubber gloves, aprons.

VI. Clean up the working environment in time: In order to prevent contamination of labor protection equipment, machinery, floors and tables, ink marks should be promptly removed. The solvent used should be non-toxic or slightly harmful (such as ethanol, acetone, ethyl acetate, etc.). Solutes or substances, and then use emulsifiers, soap, water removal is appropriate, and there should be multiple sets of work clothes as a replacement to prevent contamination of the skin.

Seven, to strengthen personal protection: in the dissolved resin to adjust the ink, dilution printing, cleaning version, roll, etc. to prevent harmful solute through the pores of the skin to penetrate freely into the human body. For example, the deposition of excessive amounts of acidic harmful substances can lead to declining renal function, even renal failure, and reduce life expectancy. When the skin is contaminated, it is first washed with water and then washed in warm water with soap and washing powder. It can also be washed with detergent or sand. If it cannot be washed out, use a low-toxic mixed solvent. If acetone is added to the ethyl ester to remove the spray or use cotton sand or absorbent cotton, gently scrub the dirty place with no pressure and rinse it with water.

Eight, pharyngitis is also caused by the pollution of ink manufacturing and printing process, and is very common. When the symptoms of gastric nerve disorders appear, Oryzanol can also be used to adjust the mechanism of gastric nerve tissue or follow the doctor's advice. There are also skin rashes after the elimination of acute symptoms, but also to continue to do a follow-up treatment, and for effective protection and safety and health, we must all know that ink in the manufacturing, printing, cleaning process will be due to differences in solvents, solute and physical fitness The difference, damage to items, operational contact, determines the speed and severity. Replacing jobs is just the next step in the measure.

9. In order to eliminate and prevent hidden accidents, it is necessary to carry out management education of scientific knowledge: the occurrence of burning and explosion accidents bring irreparable losses and regrets to the country, enterprises, society, and individuals. Safety for production, production must be safe, more for the sake of human civilization and development, and always keep a clear head, from the ink production, printing process, cleaning process, every link, grab a ring, that is, from me Start.

X. The security measures should include:

(1) Design devices for workshops and warehouses;

(2) Explosion-proof conditions for water, especially power supplies;

(3) container leakage seal requirements;

(4) Configuration maintenance of production machinery, fire-fighting equipment and medical facilities;

(5) Ventilation and convection of workshop air (exhaust window);

(6) Classification of warehouse storage items;

(7) Temperature and humidity (18~25°C, 65±5%) regulation and control of workshops and warehouses;

(8) Detection and control of excessive substances in the ink system and printing process;

(9) emission orientation of fire, exhaust, and waste;

(10) Signing the transfer procedure of the operation process;

(11) The fire restrictions on smoking and accidents in factories and offices are prohibited;

(12) Harmful and toxic materials are selected for use and transportation and storage limit line;

(13) the establishment of warning signs identification cards;

(14) regular exchange training and irregular inspection and evaluation;

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