Here, we provide a scientific, simple and easy-to-print positive PS version of the printing process and technology for printing colleagues. With the simplest equipment, the simplest process, and the least expense, we will use the existing equipment of the printing plant to create the PS version. Used for regeneration. Due to the high price and high printing costs of the PS version, many small and medium-sized printing plants, mainly short-lived, cannot be used. The traditional gravure process uses zinc plate. The plate is bulky and the printing rate is low. The dichromate in the photosensitive material is a strong carcinogen, which has serious harm to the human body and the environment. Noise, sewage, and mud in the stencil process pollute the environment. The PS version of the regeneration application, just to overcome the above drawbacks. First of all, the price of recycled PS is much lower than that of the new PS version, which is also lower than the level of gravure; secondly, its printability is the same as the new PS version, which can fully meet the printing requirements; third, the printing rate can fully meet the medium and short Edition production. This technology is especially suitable for small and medium-sized printing plants mainly based on short editions, which provides effective means for the continuous updating, high quality, low price, and diversified production of products, and does not pollute the environment at all.
First, positive graph type PS regeneration process
1. Stripping cleaning process
Whether it is a proofing version or an on-machine version, it is important to make sure that the ink and film on the clean version are as clear as possible after the imprinting; check whether the layout is subject to mechanical damage and chemical corrosion; whether the alumina film layer is intact or not, and whether the upper platen bite breaks. Any one of the above situations cannot be recycled. Put the old PS plate with intact plate base on the cleaning tank, and add a small amount of PS plate stripping liquid to the pattern part (depending on the number of viewing patterns, generally about 10-50ml), gently brush the pattern part with the brush, Until the pattern disappears completely, rinse with tap water and brush until the surface of the plate is completely clean. Add a small amount (about 10ml) of the firm liquid to the surface and gently wipe it evenly with a clean brush. After about one minute, rinse again with water and dry it. The stripping and cleaning process may depend on the scale of production, and may be handled in batches by hand, and may also be processed in batches by a stripping machine.
2. Photosensitive coating technology
There is a wide variety of positive photoresist solutions for the PS version. Users can choose according to their equipment and technical conditions. The low viscosity photosensitive solution is easy to use and can be used without further processing. The coating machine has two major categories, centrifugal and roller. Centrifugal coating machine is used for coating the gravure plate of the old gravure printing process. The process is mature and the operation is simple. The old plate-making workers in the printing factory can master many techniques. Roller coater is a mechanical mass production type, expensive, and strict operation. It requires professional skills training for the staff to operate. Put the spare regenerated base plate on the solid-plate table of the centrifugal coater, press it tightly, rinse it again with water, dry it, and take about 50ml of the photosensitive liquid (note that its viscosity is matched with the mechanical rotation speed), and the standby wheel rotates evenly. Afterwards, it is slowly poured on the surface of the plate base, gradually falling outwards from the center, allowing it to unfold and flatten naturally, remove the plates after drying, and become a recycled PS plate, which is stored away from light.
Since the aluminum base is thinner, about 0.3mm, therefore, it is necessary to press the photosensitive liquid to flatten the base when applying the photosensitive liquid, if necessary, add a rigid liner on the rotating bracket, and when it is coated on the plate, it is particularly necessary. Be careful to prevent the coating quality from being affected due to the uneven surface of the substrate. It is also possible to install a vacuum suction device on the rotating bracket so that the coating effect is better.
II. Manufacturing process of peeling liquid for regeneration of positive-type PS plate
The stripping solution is 10 series, users can choose according to the market raw materials, preparation. The raw materials used are easy to purchase and have a wide range, so long as they are available in the chemical raw material market, they will not be affected by the lack of raw materials. Each series of stripping liquids are colorless liquids, flammable, keep away from fire when stored. It is harmless to the human body and does not corrode mechanical equipment. It can be recycled, does not discharge, and does not pollute the environment. Stripping speed, stripping clean. With the use of the stripping solution, a plate prepared by applying a photosensitive liquid, and the printability thereof reaches the specifications of the new PS plate produced by the same kind of coating process. When the stripping liquid is manufactured, no equipment is needed, the process is simple, and the operation is convenient. Any printing factory can manufacture it, and the cost is low. When manufacturing, simply pour the ingredients into a plastic bucket or glass bottle, according to the following recipe, and stir it well to use.
1. Methanol series. Methanol (20 VOL% to 40 VOL%) is additive I, and 80 VOL % to 60 VOL% of solvent II and 0.1 VOL% of nonionic surfactant III are added. Solvent II may be acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylacetamide, ethyl acetate, n-amyl acetate, isoamyl acetate, benzene, n-butanol, Dimethyl sulfoxide, one or more of ether.
2. Ethanol series. Ethanol (20 VOL% to 40 VOL%) is additive I, and 80 VOL% to 60 VOL% of solvent II and 0.1 VOL% of non-ionic surfactant III are added. Solvent II may be acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylacetamide, ethyl acetate, n-amyl acetate, isoamyl acetate, benzene, n-butanol, Dimethyl sulfoxide, one or more of ether.
3. Ethylene glycol series. Ethylene glycol (10 VOL % to 30 VOL %) is an additive I, and 90 VOL % to 70 VOL % of solvent II and 0.1 VOL % of nonionic surfactant III are blended. Solvent II may be one or more of acetone, butanone, cyclohexanone, and dioxane.
4. Butanol series. n-Butanol (10 VOL % to 30 VOL %) is an additive I, and 90 VOL % to 70 VOL % of solvent II and 0.1 VOL % of nonionic surfactant III are blended. The solvent II may be acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylacetamide, dimethyl sulfoxide, n-amyl acetate, isoamyl acetate, benzene, ethyl ether. One or more of them.
5. Ether series. Diethyl ether (10 VOL% to 40 VOL%) is additive I, and it is blended with 90 VOL% to 60 VOL% of solvent II and 0.1 VOL% of non-ionic surfactant III. The solvent II may be one or more of acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylacetamide, n-amyl acetate, and dimethyl sulfoxide.
6. N-propanol series. n-Propanol (10 VOL% to 30 VOL%) is additive I, and 90 VOL% to 70 VOL% of solvent II and 0.1 VOL% of non-ionic surfactant III are blended. The solvent II may be one or more of acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylacetamide, dimethylsulfoxide.
7. Isopropanol series. Isopropanol (10 VOL % to 30 VOL %) is an additive I, and 90 VOL % to 70 VOL % of solvent II and 0.1 VOL % of nonionic surfactant III are blended. The solvent II may be one or more of acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylacetamide, dimethylsulfoxide.
8. Phenol series. Phenol (1 WT% to 5 WT%) is additive I, with 99 WT% to 95 WT% of solvent II and 0.1 WT% of nonionic surfactant III. The solvent II may be one or more of acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylacetamide, dimethylsulfoxide.
9. Amine fluoride series. Ammonium fluoride (1 wt% to 5 wt%) is additive I, with 99 wt% to 95 wt% of solvent II and 0.1 wt% of non-ionic surfactant III. The solvent II may be one or more of acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylethaneamide, dimethylsulfoxide.
10. Silicic acid (including H2SiF 610 ~ 20%, HF1%) series. Fluorosilicic acid (5 to 20 VOL%) is additive I, and 95 to 80 VOL% of solvent II and 0.1 VOL% of non-ionic surfactant III are blended. Solvent II may be one or more of acetone, butanone, cyclohexanone, and dioxane.
The auxiliaries are produced by absorbing water with the contaminated SiF4 gas emitted from the phosphate fertilizer plant of the phosphate fertilizer plant. It not only solves the problem of environmental pollution caused by SiF4, but also uses additives for free, benefiting the country and the people.
Series 9 and 10 cannot be made of glassware at the time of manufacture. Plastic containers must be used.
Third, the production of membrane liquid technology
In order to keep the alumina sand layer on the aluminum plate after peeling clean, improve the hardness and wear resistance of the entire surface, increase the surface adhesive force with the photosensitive liquid, and improve the hydrophilic effect and ink repellent effect of the sand surface After the pattern layer is stripped and cleaned, it should be treated with a hardener solution. The manufacturing technology for the film solution is: nitric acid (20%) 60 ml + phosphoric acid (40%) 40 ml, and pour it into a glass bottle in proportion and mix well. Ready to use.
(Yunnan University, Nao Shaorong, Gao Wenyan, Na Pengyuan)
First, positive graph type PS regeneration process
1. Stripping cleaning process
Whether it is a proofing version or an on-machine version, it is important to make sure that the ink and film on the clean version are as clear as possible after the imprinting; check whether the layout is subject to mechanical damage and chemical corrosion; whether the alumina film layer is intact or not, and whether the upper platen bite breaks. Any one of the above situations cannot be recycled. Put the old PS plate with intact plate base on the cleaning tank, and add a small amount of PS plate stripping liquid to the pattern part (depending on the number of viewing patterns, generally about 10-50ml), gently brush the pattern part with the brush, Until the pattern disappears completely, rinse with tap water and brush until the surface of the plate is completely clean. Add a small amount (about 10ml) of the firm liquid to the surface and gently wipe it evenly with a clean brush. After about one minute, rinse again with water and dry it. The stripping and cleaning process may depend on the scale of production, and may be handled in batches by hand, and may also be processed in batches by a stripping machine.
2. Photosensitive coating technology
There is a wide variety of positive photoresist solutions for the PS version. Users can choose according to their equipment and technical conditions. The low viscosity photosensitive solution is easy to use and can be used without further processing. The coating machine has two major categories, centrifugal and roller. Centrifugal coating machine is used for coating the gravure plate of the old gravure printing process. The process is mature and the operation is simple. The old plate-making workers in the printing factory can master many techniques. Roller coater is a mechanical mass production type, expensive, and strict operation. It requires professional skills training for the staff to operate. Put the spare regenerated base plate on the solid-plate table of the centrifugal coater, press it tightly, rinse it again with water, dry it, and take about 50ml of the photosensitive liquid (note that its viscosity is matched with the mechanical rotation speed), and the standby wheel rotates evenly. Afterwards, it is slowly poured on the surface of the plate base, gradually falling outwards from the center, allowing it to unfold and flatten naturally, remove the plates after drying, and become a recycled PS plate, which is stored away from light.
Since the aluminum base is thinner, about 0.3mm, therefore, it is necessary to press the photosensitive liquid to flatten the base when applying the photosensitive liquid, if necessary, add a rigid liner on the rotating bracket, and when it is coated on the plate, it is particularly necessary. Be careful to prevent the coating quality from being affected due to the uneven surface of the substrate. It is also possible to install a vacuum suction device on the rotating bracket so that the coating effect is better.
II. Manufacturing process of peeling liquid for regeneration of positive-type PS plate
The stripping solution is 10 series, users can choose according to the market raw materials, preparation. The raw materials used are easy to purchase and have a wide range, so long as they are available in the chemical raw material market, they will not be affected by the lack of raw materials. Each series of stripping liquids are colorless liquids, flammable, keep away from fire when stored. It is harmless to the human body and does not corrode mechanical equipment. It can be recycled, does not discharge, and does not pollute the environment. Stripping speed, stripping clean. With the use of the stripping solution, a plate prepared by applying a photosensitive liquid, and the printability thereof reaches the specifications of the new PS plate produced by the same kind of coating process. When the stripping liquid is manufactured, no equipment is needed, the process is simple, and the operation is convenient. Any printing factory can manufacture it, and the cost is low. When manufacturing, simply pour the ingredients into a plastic bucket or glass bottle, according to the following recipe, and stir it well to use.
1. Methanol series. Methanol (20 VOL% to 40 VOL%) is additive I, and 80 VOL % to 60 VOL% of solvent II and 0.1 VOL% of nonionic surfactant III are added. Solvent II may be acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylacetamide, ethyl acetate, n-amyl acetate, isoamyl acetate, benzene, n-butanol, Dimethyl sulfoxide, one or more of ether.
2. Ethanol series. Ethanol (20 VOL% to 40 VOL%) is additive I, and 80 VOL% to 60 VOL% of solvent II and 0.1 VOL% of non-ionic surfactant III are added. Solvent II may be acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylacetamide, ethyl acetate, n-amyl acetate, isoamyl acetate, benzene, n-butanol, Dimethyl sulfoxide, one or more of ether.
3. Ethylene glycol series. Ethylene glycol (10 VOL % to 30 VOL %) is an additive I, and 90 VOL % to 70 VOL % of solvent II and 0.1 VOL % of nonionic surfactant III are blended. Solvent II may be one or more of acetone, butanone, cyclohexanone, and dioxane.
4. Butanol series. n-Butanol (10 VOL % to 30 VOL %) is an additive I, and 90 VOL % to 70 VOL % of solvent II and 0.1 VOL % of nonionic surfactant III are blended. The solvent II may be acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylacetamide, dimethyl sulfoxide, n-amyl acetate, isoamyl acetate, benzene, ethyl ether. One or more of them.
5. Ether series. Diethyl ether (10 VOL% to 40 VOL%) is additive I, and it is blended with 90 VOL% to 60 VOL% of solvent II and 0.1 VOL% of non-ionic surfactant III. The solvent II may be one or more of acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylacetamide, n-amyl acetate, and dimethyl sulfoxide.
6. N-propanol series. n-Propanol (10 VOL% to 30 VOL%) is additive I, and 90 VOL% to 70 VOL% of solvent II and 0.1 VOL% of non-ionic surfactant III are blended. The solvent II may be one or more of acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylacetamide, dimethylsulfoxide.
7. Isopropanol series. Isopropanol (10 VOL % to 30 VOL %) is an additive I, and 90 VOL % to 70 VOL % of solvent II and 0.1 VOL % of nonionic surfactant III are blended. The solvent II may be one or more of acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylacetamide, dimethylsulfoxide.
8. Phenol series. Phenol (1 WT% to 5 WT%) is additive I, with 99 WT% to 95 WT% of solvent II and 0.1 WT% of nonionic surfactant III. The solvent II may be one or more of acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylacetamide, dimethylsulfoxide.
9. Amine fluoride series. Ammonium fluoride (1 wt% to 5 wt%) is additive I, with 99 wt% to 95 wt% of solvent II and 0.1 wt% of non-ionic surfactant III. The solvent II may be one or more of acetone, butanone, cyclohexanone, dioxane, dimethylformamide, dimethylethaneamide, dimethylsulfoxide.
10. Silicic acid (including H2SiF 610 ~ 20%, HF1%) series. Fluorosilicic acid (5 to 20 VOL%) is additive I, and 95 to 80 VOL% of solvent II and 0.1 VOL% of non-ionic surfactant III are blended. Solvent II may be one or more of acetone, butanone, cyclohexanone, and dioxane.
The auxiliaries are produced by absorbing water with the contaminated SiF4 gas emitted from the phosphate fertilizer plant of the phosphate fertilizer plant. It not only solves the problem of environmental pollution caused by SiF4, but also uses additives for free, benefiting the country and the people.
Series 9 and 10 cannot be made of glassware at the time of manufacture. Plastic containers must be used.
Third, the production of membrane liquid technology
In order to keep the alumina sand layer on the aluminum plate after peeling clean, improve the hardness and wear resistance of the entire surface, increase the surface adhesive force with the photosensitive liquid, and improve the hydrophilic effect and ink repellent effect of the sand surface After the pattern layer is stripped and cleaned, it should be treated with a hardener solution. The manufacturing technology for the film solution is: nitric acid (20%) 60 ml + phosphoric acid (40%) 40 ml, and pour it into a glass bottle in proportion and mix well. Ready to use.
(Yunnan University, Nao Shaorong, Gao Wenyan, Na Pengyuan)
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