CN112172364A - High-cleanliness tinplate lithography process - Google Patents
High-cleanliness tinplate lithography process Download PDFInfo
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- CN112172364A CN112172364A CN201910604885.9A CN201910604885A CN112172364A CN 112172364 A CN112172364 A CN 112172364A CN 201910604885 A CN201910604885 A CN 201910604885A CN 112172364 A CN112172364 A CN 112172364A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/26—Printing on other surfaces than ordinary paper
- B41M1/28—Printing on other surfaces than ordinary paper on metals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M1/00—Inking and printing with a printer's forme
- B41M1/06—Lithographic printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
- B41M3/14—Security printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0011—Pre-treatment or treatment during printing of the recording material, e.g. heating, irradiating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0011—Pre-treatment or treatment during printing of the recording material, e.g. heating, irradiating
- B41M5/0017—Application of ink-fixing material, e.g. mordant, precipitating agent, on the substrate prior to printing, e.g. by ink-jet printing, coating or spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0018—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using ink-fixing material, e.g. mordant, precipitating agent, after printing, e.g. by ink-jet printing, coating or spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M7/00—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock
- B41M7/0054—After-treatment of prints, e.g. heating, irradiating, setting of the ink, protection of the printed stock using protective coatings or film forming compositions cured by thermal means, e.g. infrared radiation, heat
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Abstract
The invention relates to the technical field of tin printing, in particular to a high-cleanliness tinplate lithography process, which comprises the following steps: (1) pretreatment: carrying out surface treatment on the tinplate, and then carrying out internal coating and external coating; (2) plate making: carrying out color separation on an original to be printed, making patterns subjected to color separation into a sample picture on a PS plate, and exposing the PS plate through a continuous printing machine to form a printing plate; (3) printing: transferring the ink to the outer coating surface of the tinplate by using an offset press and a printing plate; (4) and (3) drying: putting the tinplate into a drying box, and drying the tinplate sequentially through a heating area, a constant temperature area and a cooling area. The flat printing process adopts the steps of pretreatment, plate making, printing and drying, and the tinplate is dried by putting the tinplate into a drying box and sequentially passing through a heating area, a constant temperature area and a cooling area, so that the quality of the tin plate is high, and the qualified product rate is high.
Description
Technical Field
The invention relates to the technical field of tin printing, in particular to a tinplate lithography process with high cleanliness.
Background
Along with the development of times and the improvement of living standard, the demand of people on food packaging cans is more and more, the time consumed by the traditional metal printing coating process is longer, the production efficiency is lower, and the requirements of the existing market cannot be met, meanwhile, in the existing metal can metal printing process, the rust-proof process is poorer, the rust-proof capability is lower, and the filling and storage requirements of weak-acid or weak-alkaline beverages cannot be met, so that a metal printing process for improving the metal tube metal printing efficiency of the food is urgently needed to be found, in the existing production, UV ultraviolet metal printing is adopted, the production is rapid, the constant-temperature drying is carried out, the quality of the metal printing is poorer, and the qualified product rate is low.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a tinplate lithography process with high cleanliness.
Another object of the present invention is to provide a high-cleanliness tinplate lithographic product, which has good surface gloss, uniform ink, clear fonts and patterns, and high cleanliness.
The purpose of the invention is realized by the following technical scheme: a high-cleanliness tinplate lithography process comprises the following steps:
(1) pretreatment: carrying out surface treatment on the tinplate, and then carrying out internal coating and external coating;
(2) plate making: carrying out color separation on an original to be printed, making patterns subjected to color separation into a sample picture on a PS plate, and exposing the PS plate through a continuous printing machine to form a printing plate;
(3) printing: transferring the ink to the outer coating surface of the tinplate by using an offset press and a printing plate;
(4) and (3) drying: putting the tinplate into a drying box, and drying the tinplate sequentially through a heating area, a constant temperature area and a cooling area.
In the step (1), the surface treatment includes dust removal treatment, oil removal treatment and passivation treatment. The invention can improve the surface smoothness and the smoothness by carrying out dust removal treatment, oil removal treatment and passivation treatment on the tinplate, is beneficial to the printing and greatly improves the printing quality.
Preferably, in the step (1), the internal coating step is: coating transparent oil or gold oil on the back surface of the tinplate, and curing. Curing in an oven at 180-190 deg.C for 5-15 min.
The transparent oil or the gold oil is any one of phenolic resin paint, epoxy-phenolic resin paint, acrylic resin paint, epoxy amino paint, polyester resin paint, aluminum powder paint, organosol paint and demoulding paint. The transparent oil or the gold oil is internally coated, so that the transparent oil or the gold oil has corrosion resistance, better adhesiveness, flexibility and heat resistance, is nontoxic and tasteless, can improve the corrosion resistance of a package, and provides performance required by subsequent processing. More preferably, in the step (1), the transparent oil or the gold oil is a polyester resin coating with the solid content of 33-37% and the viscosity of 60-80s, such as G-T48-CA series transparent oil or gold oil.
Preferably, in the step (1), the step of coating comprises: coating base oil or white magnetic oil on the front surface of the tinplate, and curing. Curing in an oven at 150-160 deg.C for 5-15 min.
The base oil is any one of vinyl resin base oil, modified vinyl resin base oil, epoxy-amino resin base oil, acrylic resin base oil and polyester resin base oil. The base oil has good transparency, so that the yellowing property is small after the base oil is dried and formed into a film, the metallic texture cannot be covered, the leveling property, the thermosetting property and the flexibility are good, the affinity is good, and the adhesive force between tinplate and printing ink can be improved. More preferably, in the step (2), the base oil is polyester resin base oil with the solid content of 23-27% and the viscosity of 40-50s, such as GS-29 series golden base oil.
The white magnetic oil is any one of alkyd resin white magnetic oil, acrylic resin white magnetic oil and polyester resin white magnetic oil. By adopting the white magnetic oil, the invention has the advantages of good adhesive force, good flexibility, no toxicity, no pollution, certain flame retardant effect on fire, excellent solvent resistance and strong decorative performance. More preferably, in the step (2), the white magnetic oil is polyester resin white magnetic oil with a solid content of 57-63% and a viscosity of 160-200s, such as W-T10-706XL white magnetic oil.
Preferably, in the step (2), the document to be printed is subjected to a preset deformation process. For the packaging product needing deep drawing, because the pattern is twisted and deformed in the drawing process, the invention can best restore the pattern in the final processing by performing preset deformation treatment on the original before printing.
Preferably, in the step (2), the non-image-text part of the PS plate is coated with a fountain solution, and the pH of the fountain solution is 5 to 6. When the PH value of the fountain solution is less than 5, the ink is easy to emulsify, the plate is pasted, and the dot expansion rate is increased. The invention can ensure that the blank part is not stained with ink and ensure that the non-image-text part has good hydrophilicity by adopting the fountain solution with the pH of 5-6.
Preferably, in the step (3), the ink is a security ink. The invention adopts the anti-counterfeiting ink, and observes the color change of the ink printing sample by applying different external conditions, such as illumination, heating, spectrum detection and the like, thereby achieving the anti-counterfeiting purpose.
Preferably, in the step (4), the temperature in the heating area is gradually increased from 20-30 ℃ to 70-80 ℃, the temperature in the heating area is constantly 70-80 ℃, and the temperature in the cooling area is gradually decreased from 70-80 ℃ to 10-20 ℃; the time of the tinplate in the heating area is 3-5h, the time in the constant temperature area is 3-5h, and the time in the cooling area is 1-3 h. The main function of the temperature rising area is to raise the temperature of the iron sheet from room temperature to a set temperature, the main function of the constant temperature area is to keep the temperature reached by the temperature rising area, the cooling area is used for fully cooling the dried iron sheet, if the iron sheet is not cooled enough, a paint film is easy to scratch when the iron sheet is collected, and the iron sheet is easy to stick after being stacked.
Insufficient baking of the ink can result in the ink becoming soft and failing to perform its maintenance or other functions adequately. When the baking is excessive, many inks become brittle and are easy to generate paint explosion during processing, and the color of the inks is changed to yellow due to excessive baking, so that products are scrapped due to excessive baking or insufficient baking. To avoid under-baking or over-baking, the temperature and time of each zone must be tightly controlled. The invention can exert the best performance of the ink by strictly controlling the temperature and time of the heating area, the constant temperature area and the cooling area, and has high quality of the iron printing and high qualified product rate.
Preferably, the step (4) is followed by a step (5) of coating varnish on the front surface of the tinplate printed with the pattern and curing. Curing in an oven at 155-165 deg.C for 5-15 min.
The gloss oil is any one of pearl oil, explosive oil, orange peel oil and wrinkle oil. By adopting the gloss oil, the surface of the printed product can show a special display effect. Further, in the step (4), the gloss oil is any one of epoxy resin gloss oil, alkyd resin gloss oil, acrylic amino gloss oil and polyester resin gloss oil. By adopting the gloss oil, the surface gloss of a printing piece can be increased, and meanwhile, certain hardness is increased, so that a coating film on a printing surface has certain flexibility and corrosion resistance, and an ink layer and a base coat in the printing piece are protected. Preferably, in the step (4), the gloss oil is 40% -44% polyester resin gloss oil with the viscosity of 100-120s, such as F-T38-16C series gloss oil.
Preferably, the step (5) is followed by a step (6) of printing a matte ink on the front surface of the tinplate coated with the varnish, and curing. Curing in an oven at 160-170 deg.C for 5-15 min.
The other purpose of the invention is realized by the following technical scheme: a high-cleanliness tinplate lithographic product is prepared according to the above-mentioned lithographic process.
The invention has the beneficial effects that: the flat printing process adopts the steps of pretreatment, plate making, printing and drying, and the tinplate is dried by putting the tinplate into a drying box and sequentially passing through a heating area, a constant temperature area and a cooling area, so that the quality of the tin plate is high, and the qualified product rate is high.
The tinplate lithographic printing product with high cleanliness has good surface glossiness, uniform printing ink, clear characters and patterns and high cleanliness.
Detailed Description
The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.
Example 1
A high-cleanliness tinplate lithography process comprises the following steps:
(1) pretreatment: carrying out surface treatment on the tinplate, and then carrying out internal coating and external coating;
(2) plate making: carrying out color separation on an original to be printed, making patterns subjected to color separation into a sample picture on a PS plate, and exposing the PS plate through a continuous printing machine to form a printing plate;
(3) printing: transferring the ink to the outer coating surface of the tinplate by using an offset press and a printing plate;
(4) and (3) drying: putting the tinplate into a drying box, and drying the tinplate sequentially through a heating area, a constant temperature area and a cooling area.
In the step (1), the internal coating step is as follows: coating transparent oil or gold oil on the back surface of tinplate, and curing in an oven at 180 deg.C for 15 min. The transparent oil or the gold oil is phenolic resin paint or epoxy-phenolic resin paint.
In the step (1), the outer coating step is as follows: coating base oil or white magnetic oil on the front surface of tinplate, and curing in an oven at 150 deg.C for 15 min. The base oil is vinyl resin base oil; the white magnetic oil is alkyd resin white magnetic oil.
In the step (2), a preset deformation process is performed on the original document to be printed.
In the step (2), the non-image-text part of the PS plate is coated with fountain solution, and the pH value of the fountain solution is 5.
In the step (3), the printing ink is anti-counterfeiting printing ink.
In the step (4), the temperature in the heating area is gradually increased from 20 ℃ to 70 ℃, the temperature in the heating area is constant at 70 ℃, and the temperature in the cooling area is gradually decreased from 70 ℃ to 10 ℃; the time of the tinplate in the heating area is 5 hours, the time in the constant temperature area is 5 hours, and the time in the cooling area is 3 hours.
And (4) coating gloss oil on the front surface of the tinplate printed with the pattern in step (5), and curing by using an oven at the temperature of 155 ℃ for 15 min. The gloss oil is bead point oil, and specifically, the gloss oil is epoxy resin gloss oil.
And (5) printing matte ink on the front surface of the tinplate coated with the gloss oil, and curing by using an oven at 160 ℃ for 15 min.
A high-cleanliness tinplate lithographic product is prepared according to the above-mentioned lithographic process.
Example 2
This embodiment is different from embodiment 1 described above in that:
in the step (1), the internal coating step is as follows: coating transparent oil or gold oil on the back surface of the tinplate, and curing in an oven at 182 deg.C for 12 min. The transparent oil or the gold oil is acrylic resin paint or epoxy amino paint.
In the step (1), the outer coating step is as follows: coating base oil or white magnetic oil on the front surface of tinplate, and curing in an oven at 152 deg.C for 12 min. The base oil is modified vinyl resin base oil; the white magnetic oil is acrylic resin white magnetic oil.
In the step (2), the non-image-text part of the PS plate is coated with fountain solution, and the pH value of the fountain solution is 5.2.
In the step (4), the temperature in the heating area is gradually increased from 22 ℃ to 72 ℃, the temperature in the heating area is constant at 72 ℃, and the temperature in the cooling area is gradually decreased from 72 ℃ to 12 ℃; the time of the tinplate in the heating area is 4.5 hours, the time in the constant temperature area is 4.5 hours, and the time in the cooling area is 2.5 hours.
And (4) coating gloss oil on the front surface of the tinplate printed with the pattern in step (5), and curing by using an oven at the temperature of 158 ℃ for 12 min. The gloss oil is pearl oil, and specifically, the gloss oil is alkyd resin gloss oil.
And (5) printing matte ink on the front surface of the tinplate coated with the gloss oil, and curing the tinplate by using an oven at 162 ℃ for 12 min.
Example 3
This embodiment is different from embodiment 1 described above in that:
in the step (1), the internal coating step is as follows: coating transparent oil or gold oil on the back surface of tinplate, and curing in oven at 185 deg.C for 10 min. The transparent oil or the gold oil is a polyester resin coating with the solid content of 33-37% and the viscosity of 60-80 s.
In the step (1), the outer coating step is as follows: coating base oil or white magnetic oil on the front surface of tinplate, and curing in oven at 155 deg.C for 10 min. The base oil is polyester resin base oil with the solid content of 23-27% and the viscosity of 40-50 s; the white magnetic oil is polyester resin white magnetic oil with the solid content of 57-63% and the viscosity of 160-200 s.
In the step (2), the non-image-text part of the PS plate is coated with fountain solution, and the pH value of the fountain solution is 5.5.
In the step (4), the temperature in the heating area is gradually increased from 25 ℃ to 75 ℃, the temperature in the heating area is constant at 75 ℃, and the temperature in the cooling area is gradually decreased from 75 ℃ to 15 ℃; the time of the tinplate in the heating area is 4 hours, the time in the constant temperature area is 4 hours, and the time in the cooling area is 2 hours.
And (4) coating gloss oil on the front surface of the tinplate printed with the pattern in step (5), and curing by using an oven at the temperature of 160 ℃ for 10 min. The gloss oil is explosion oil, and specifically, the gloss oil is 40% -44% polyester resin gloss oil with the viscosity of 100-120 s.
And (5) printing matte ink on the front surface of the tinplate coated with the gloss oil, and curing the tinplate by using an oven at 165 ℃ for 10 min.
Example 4
This embodiment is different from embodiment 1 described above in that:
in the step (1), the internal coating step is as follows: coating transparent oil or gold oil on the reverse side of tinplate, and oven curing at 188 deg.C for 8 min. The transparent oil or the gold oil is aluminum powder coating.
In the step (1), the outer coating step is as follows: coating base oil or white magnetic oil on the front surface of tinplate, and curing in an oven at 158 deg.C for 8 min. The base oil is epoxy-amino resin base oil; the white magnetic oil is alkyd resin white magnetic oil.
In the step (2), the non-image-text part of the PS plate is coated with fountain solution, and the pH value of the fountain solution is 5.8.
In the step (4), the temperature in the heating area is gradually increased from 28 ℃ to 78 ℃, the temperature in the heating area is constant at 78 ℃, and the temperature in the cooling area is gradually decreased from 78 ℃ to 18 ℃; the time of the tinplate in the heating area is 3.5 hours, the time in the constant temperature area is 3.5 hours, and the time in the cooling area is 1.5 hours.
And (4) coating gloss oil on the front surface of the tinplate printed with the pattern in step (5), and curing by using an oven at 162 ℃ for 8 min. The gloss oil is orange peel oil, and specifically, the gloss oil is acrylic resin gloss oil.
And (5) printing matte ink on the front surface of the tinplate coated with the gloss oil, and curing the tinplate by using an oven at 168 ℃ for 8 min.
Example 5
This embodiment is different from embodiment 1 described above in that:
in the step (1), the internal coating step is as follows: coating transparent oil or gold oil on the back surface of tinplate, and curing in oven at 190 deg.C for 5 min. The transparent oil or the gold oil is organic sol paint or stripping paint.
In the step (1), the outer coating step is as follows: coating base oil or white magnetic oil on the front surface of tinplate, and curing in an oven at 160 deg.C for 5 min. The base oil is acrylic resin base oil; the white magnetic oil is acrylic resin white magnetic oil.
In the step (2), the non-image-text part of the PS plate is coated with fountain solution, and the pH value of the fountain solution is 6.
In the step (4), the temperature in the heating area is gradually increased from 30 ℃ to 80 ℃, the temperature in the heating area is constant at 80 ℃, and the temperature in the cooling area is gradually decreased from 80 ℃ to 20 ℃; the time of the tinplate in the heating area is 3 hours, the time in the constant temperature area is 3 hours, and the time in the cooling area is 1 hour.
And (4) coating gloss oil on the front surface of the tinplate printed with the pattern in step (5), and curing by using an oven at 165 ℃ for 5 min. The gloss oil is wrinkle oil, specifically, the gloss oil is acrylic amino gloss oil.
And (5) printing matte ink on the front surface of the tinplate coated with the gloss oil, and curing by using an oven at the temperature of 170 ℃ for 5 min.
Through detection, the main performance indexes of the high-cleanliness tinplate lithographic product prepared by the invention are as follows:
| detecting items | Test method | Test results |
| Scratch mark | GB/T 9279-2007 | Grade I (non-scratch) |
| Adhesion force | Cutting a small test piece (25M) from the iron to be measuredM × 120 MM); 4 on the loose moving plate A nut; the test piece is placed under the pressing block on the moving plate (the surface to be measured is upward), and the adjustment is carried out The position of the test piece, which is to make the test piece located in the middle of the moving plate, is flattened and 4 nuts are screwed; dish A weight of 300g is placed on the needle head, and the knob at the upper end of the movable plate is rotated anticlockwise to ensure that the needle head Descending to contact with the surface of the test piece; rotate the right-hand turntable clockwise for several circles to draw out the length A spiral coil with the length of 70-100 mm and the diameter of 10 mm; clockwise turning knob lift The needle head loosens the pressing block, resets the movable plate to the left end, and takes down the test piece; by means of brushes Brushing off the scraps on the test piece, adhering the test piece on the scratch of the coating film by using a 3M adhesive tape, and firmly pressing the test piece by using fingers (no bubble inside), the tape was quickly torn off, and the area of the coating film that fell off was observed. | Class I (film coating not at all) Exfoliation) |
| Impact resistance | Cutting a film test piece (about 10cm × 15 cm), placing between a striker and a base, and measuring the coating The film surface faces upwards; pulling out the bolt to make a hammer with the weight of 1kg fall freely at the position of 50cm Dropping the impact test piece; the impacted test pieces were dipped in 20% CuSO4Solution for 3 minutes Taking out and washing with water; after washing, whether the paint film of the impact part (concave lip) rusted or not was observed. | No cracking and peeling of paint film Falling and rusting phenomena |
| Resistance to vulcanization | Preparing 250ml of sulfur-resistant solution, and filling the solution into a closed container; test piece of painted sheet iron (ca 10cm × 5 cm) into a closed container (or an empty tank); then high temperature sterilization 121 is carried out The film of the test piece was taken out and observed at a temperature of 30 minutes. | The paint film does not become black after vulcanization |
| Solvent resistance | Wiping cotton with butanone or acetone on the surface of the coating film for 80 times in one direction, and observingCoating composition And (4) wiping the surface of the film. | No paint drop or loss of the coating film Delustering and discoloring Elephant |
| Acid resistance | Blending 2% citric acid solution, and filling into a sealed container; test pieces (about 10 cm) of the coated sheet iron X 5 cm) is put into a closed container to be closed; then high-temperature sterilization is carried out at 121 ℃ for 30 min And then taking out to observe the surface condition of the coating. | No peeling or change of the coating Color phenomena |
| Resistance to tarnish | The copper sulfate solution is prepared by a beaker, and the formula of the components is as follows: copper sulfate (CuSO)4.5H2O） 20 percent, 10 percent of concentrated hydrochloric acid (HCl, the mass fraction is 35 percent) and 70 percent of distilled water; will test The test piece is immersed in a copper sulfate solution for 3 minutes, taken out and washed clean by clear water. | The surface of the paint film has no red copper Color rust phenomenon |
The flat printing process adopts the steps of pretreatment, plate making, printing and drying, and the tinplate is dried by putting the tinplate into a drying box and sequentially passing through a heating area, a constant temperature area and a cooling area, so that the quality of the tin plate is high, and the qualified product rate is high.
The high-cleanliness tinplate lithographic printing product has the advantages of good surface gloss, uniform printing ink, clear fonts and patterns, high cleanliness, good paint film adhesion on the surface of the product, scratch resistance, impact resistance, vulcanization resistance, solvent resistance, acid resistance, rust resistance and excellent comprehensive performance.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.
Claims (10)
1. A tinplate lithography process with high cleanliness is characterized in that: the method comprises the following steps:
(1) pretreatment: carrying out surface treatment on the tinplate, and then carrying out internal coating and external coating;
(2) plate making: carrying out color separation on an original to be printed, making patterns subjected to color separation into a sample picture on a PS plate, and exposing the PS plate through a continuous printing machine to form a printing plate;
(3) printing: transferring the ink to the outer coating surface of the tinplate by using an offset press and a printing plate;
(4) and (3) drying: putting the tinplate into a drying box, and drying the tinplate sequentially through a heating area, a constant temperature area and a cooling area.
2. A high-cleanliness tinplate lithography process according to claim 1, wherein: in the step (1), the internal coating step is as follows: coating transparent oil or gold oil on the back surface of the tinplate, and curing.
3. A high-cleanliness tinplate lithography process according to claim 1, wherein: in the step (1), the outer coating step is as follows: coating base oil or white magnetic oil on the front surface of the tinplate, and curing.
4. A high-cleanliness tinplate lithography process according to claim 1, wherein: in the step (2), a preset deformation process is performed on the original document to be printed.
5. A high-cleanliness tinplate lithography process according to claim 1, wherein: in the step (2), the non-image-text part of the PS plate is coated with fountain solution, and the pH value of the fountain solution is 5-6.
6. A high-cleanliness tinplate lithography process according to claim 1, wherein: in the step (3), the printing ink is anti-counterfeiting printing ink.
7. A high-cleanliness tinplate lithography process according to claim 1, wherein: in the step (4), the temperature in the heating area is gradually increased from 20-30 ℃ to 70-80 ℃, the temperature in the heating area is constantly 70-80 ℃, and the temperature in the cooling area is gradually decreased from 70-80 ℃ to 10-20 ℃; the time of the tinplate in the heating area is 3-5h, the time in the constant temperature area is 3-5h, and the time in the cooling area is 1-3 h.
8. A high-cleanliness tinplate lithography process according to claim 1, wherein: and (4) coating gloss oil on the front surface of the tinplate printed with the pattern and curing in the step (5).
9. A high-cleanliness tinplate lithography process according to claim 1, wherein: and (5) printing matte ink on the front surface of the tinplate coated with the gloss oil, and curing.
10. A high-cleanliness tinplate lithographic product is characterized in that: the high-cleanliness tinplate lithographic article is made according to the tinplate lithographic process of any one of claims 1-9.
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| CN201910604885.9A CN112172364A (en) | 2019-07-05 | 2019-07-05 | High-cleanliness tinplate lithography process |
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| CN201910604885.9A CN112172364A (en) | 2019-07-05 | 2019-07-05 | High-cleanliness tinplate lithography process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114771121A (en) * | 2022-05-09 | 2022-07-22 | 浙江中翔印铁制罐有限公司 | Environment-friendly printing process and equipment for manufacturing tin printing iron |
| CN115107389A (en) * | 2022-06-29 | 2022-09-27 | 河钢集团衡水板业有限公司 | Method for producing explosive oil product by drying room and RTO |
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| CN115107389B (en) * | 2022-06-29 | 2023-08-22 | 河钢集团衡水板业有限公司 | Method for producing explosive oil product by baking house and RTO |
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