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 Posted: Sun 2:49, 08 May 2011 Post subject: Christian Louboutin In the corrugated board printi |
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In the corrugated board printing water-based ink used in some of the issues should be noted
L, this time adding a small amount of diluent can be adjusted at the same time; ③ dilution of profits. Mainly used to reduce the viscosity of water-based ink. Below 3% the amount of water-based ink will not reduce the color depth, and can maintain a constant pH, water-based ink. Thinner should be added slowly while stirring to prevent the viscosity is too low. Add more thinner or use the hardness of the water dilution will lead to bubbles, this time will be added antifoam defoamer; ④ thickener. Used to increase the viscosity of water-based ink, to control the amount of 0.5% to 1%, so as not to affect the printing quality of ink viscosity is too high; ⑤ slow drying agent. Used to reduce water-based ink drying rate, dosage can be controlled from 0 to 10%. In general, water-based ink is suitable for high-speed printing, thus requiring faster drying, and only if the experience in low-speed drying time of printing, the printing speed is too fast or the situation poorly, only a small amount of slow drying agent to meet the appropriate printing sex; ⑥ drying agent. Water-based ink used to speed up the drying rate, the amount of the general control of 0 ~ 30%; ⑦ defoamer. Used to eliminate air bubbles, the dosage should be controlled at 0.1% ~ 0.2%; ⑧ pH value of the stabilizer. Mainly used to maintain the stability of pH, water-based inks are generally water-based ink used in the pH value should be maintained at 8.5 to 9.5, if in excess of this range or on the printed substrate Aung IJ suited to the environment and should be timely suitably adjusted to the pH value and maintain stability. Third, the water-based ink in the development and application we know that printing ink is a pigment, links agents, solvents, auxiliary agents formed. The organic solvents and heavy metals severely damage the human body. Most of the traditional solvent-based ink drying used mainly in the form of volatile, low boiling point solvents, likely to be volatile,[link widoczny dla zalogowanych], and volatile toxic gases released only when the pollution of the environment, harmful to the operator and the surface after printing has residual harmful substances,[link widoczny dla zalogowanych], is not suitable for printing food packaging, pharmaceutical packaging, children's toys and other packaging. The water-based ink and solvent-based inks biggest difference lies in the water-based ink used in the solvent is water rather than organic solvents. Its greatest feature is significantly reduced volatile organic compounds (voc) emissions, thus preventing air pollution, no effect on human health, not combustion, safety, and it can completely eliminate the solvent-based inks in some of the toxic and hazardous substances on the human body and the pollution of packaging products, improve the environmental quality of the printing operation is conducive to the health of workers. Especially for food, beverage, pharmaceutical and other health conditions require strict packaging and printing products. In addition, it can not only reduce static electricity and flammable solvents because of fire hazards and risks arising from, but also can reduce the printed surface of the residual solvent odor. Water-based ink is recognized worldwide as environmentally friendly printing ink, is the only all of printing ink by the U.S. Food and Drug Association approved the inorganic ink. Stability of ink water-based ink, colorful, non-corrosive plates, simple, cheap, India, good adhesion, water resistance strong, dry quickly, especially for food, pharmaceutical,[link widoczny dla zalogowanych], cosmetics and other health conditions, demanding packaging and decoration printing products in the printing and use. Printed in the U.S., 40% of plastic water-based ink used, and other economically developed countries (such as Japan, Germany, France,[link widoczny dla zalogowanych], etc.) in the plastic film printing the amount of water-based ink used in more and more. The United Kingdom has legislation against solvent-based ink food film. According to the data reported to the United States of photochemical smog from the organic volatile organic solvents (V0C) emissions are strictly limited, and water-based ink to meet the VOC requirements, the proportion of volatile components 25%, 75% moisture above; water use less ink in the state, the non-volatile components of 60% or more of these two criteria. Water-based ink is usually a paper-plastic products, paper products, including print and use. The feature is able to meet the printing ink of the paper, making the full color printing, more important is the solvent is water and ethanol, environmental pollution, called the green printing ink. In addition, water-based UV ink UV ink is also the area of a new research direction. General Uv ink viscosity in the prepolymer are generally large, to be diluted by adding reactive diluent into pieces. At present, the thinner acrylic esters with different degrees of skin irritation and toxicity, so in the development of low viscosity prepolymers and low toxicity of reactive diluent at the same time,[link widoczny dla zalogowanych], research water-based UV inks is of great significance. Water-based UV ink is used as a diluent such as water and ethanol, UV inks, alcohol-soluble ink can not only have good compatibility and excellent adhesive properties, but also still very low in VOC emissions achieved under the circumstances lower toxicity, the present water-based UV inks have been successfully developed and be applied in a number of printing.
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