The main advantages of screen printing in flexible packaging printing are:
Thick ink layer. This is incomparable to other printing. Under normal conditions, the ink thickness of the screen printing can reach more than 20 microns, and special up to 100 microns. Therefore, the printed product has the characteristics of full and thick ink, strong three-dimensional impression, and outstanding color. However, the thin ink layer can reach about 6 microns, so its adjustable range is large and its selectivity is strong.
The adaptability to the ink. Other printing has high requirements for inks, generally requiring uniform distribution, fine particles, and good fluidity. Screen printing, though with good ink quality, is also an important condition for improving the quality of printed products, but because of its use of missing printing The method, relatively speaking, is not particularly strict with respect to ink requirements, and liquid ink, powdery oil black, water-based ink, and oil-based ink can all be used.
The printable surface of the substrate is wide. Screen printing, known as universal printing, can print on all substrates except water and air. Although this is somewhat exaggerated, it is an indisputable fact that screen printing is widely available. It can be printed on substrates of various materials (such as rigid plastics, flexible packaging plastics, plastic woven bags, paper, fabrics, wood, metal, glass, ceramics, leather, etc.) and is not limited to various shapes and sizes. For example, it can be printed on planes, on curved surfaces, on spheres, on large-format surfaces, on small-format substrates. For packaging printing, it can also be printed on packed drinks, food cans, and printed on packed cartons.
Printing pressure is small. Since the screen printing plate is made of a soft and elastic material, its printing pressure is small and it can be printed on easily damaged articles such as eggs.
As the screen printing products are still difficult to reach the height of fine prints in terms of printing accuracy, in addition, there are fewer mechanized and automated devices suitable for flexible packaging printing (generally only rotary screen type screen printing machines ), thus greatly limiting its share in the field of flexible packaging printing, but with the progress of screen printing equipment and technology, this status will have a certain improvement.
All in all, choosing a flexible packaging printing method not only takes into account the advantages and disadvantages of different printing methods, but also considers the cost, quality, etc., and also depends on the characteristics of the substrate, for example, flexographic printing equipment investment is relatively small, and gravure printing Equipment is generally more expensive. Flexographic printing quality is still inferior to gravure printing. With the improvement of anilox roller manufacturing technology and flexo plate making technology, the quality of flexographic printing will gradually increase. Consumables support. The large amount of consumables required for flexo printing depends on imports, while gravure printing consumables have already been domesticated, and domestic consumables can be completely self-sufficient. In terms of environmental protection, flexo printing has a high degree of environmental protection, and gravure printing is relatively poor and needs improvement. From the perspective of printing costs, flexographic printing is more economical when printing small-volume products, and gravure printing is more suitable for large-volume printing. However, no matter which printing method is adopted, considering the characteristics of flexible packaging products, it is generally expected that the printing equipment can meet the following requirements: (1) capable of handling various printing materials with different properties; (2) capable of achieving the desired printing quality; 3) In view of the fact that most flexible packaging products are produced in large quantities, to ensure the consistency of the color of printed products, the downtime of the equipment should be minimized in the process of use; (4) The overall energy consumption of the equipment should be low; (5) From the perspective of environmental protection For starting, the equipment should adopt a closed structure and have a waste solvent recovery device.
Thick ink layer. This is incomparable to other printing. Under normal conditions, the ink thickness of the screen printing can reach more than 20 microns, and special up to 100 microns. Therefore, the printed product has the characteristics of full and thick ink, strong three-dimensional impression, and outstanding color. However, the thin ink layer can reach about 6 microns, so its adjustable range is large and its selectivity is strong.
The adaptability to the ink. Other printing has high requirements for inks, generally requiring uniform distribution, fine particles, and good fluidity. Screen printing, though with good ink quality, is also an important condition for improving the quality of printed products, but because of its use of missing printing The method, relatively speaking, is not particularly strict with respect to ink requirements, and liquid ink, powdery oil black, water-based ink, and oil-based ink can all be used.
The printable surface of the substrate is wide. Screen printing, known as universal printing, can print on all substrates except water and air. Although this is somewhat exaggerated, it is an indisputable fact that screen printing is widely available. It can be printed on substrates of various materials (such as rigid plastics, flexible packaging plastics, plastic woven bags, paper, fabrics, wood, metal, glass, ceramics, leather, etc.) and is not limited to various shapes and sizes. For example, it can be printed on planes, on curved surfaces, on spheres, on large-format surfaces, on small-format substrates. For packaging printing, it can also be printed on packed drinks, food cans, and printed on packed cartons.
Printing pressure is small. Since the screen printing plate is made of a soft and elastic material, its printing pressure is small and it can be printed on easily damaged articles such as eggs.
As the screen printing products are still difficult to reach the height of fine prints in terms of printing accuracy, in addition, there are fewer mechanized and automated devices suitable for flexible packaging printing (generally only rotary screen type screen printing machines ), thus greatly limiting its share in the field of flexible packaging printing, but with the progress of screen printing equipment and technology, this status will have a certain improvement.
All in all, choosing a flexible packaging printing method not only takes into account the advantages and disadvantages of different printing methods, but also considers the cost, quality, etc., and also depends on the characteristics of the substrate, for example, flexographic printing equipment investment is relatively small, and gravure printing Equipment is generally more expensive. Flexographic printing quality is still inferior to gravure printing. With the improvement of anilox roller manufacturing technology and flexo plate making technology, the quality of flexographic printing will gradually increase. Consumables support. The large amount of consumables required for flexo printing depends on imports, while gravure printing consumables have already been domesticated, and domestic consumables can be completely self-sufficient. In terms of environmental protection, flexo printing has a high degree of environmental protection, and gravure printing is relatively poor and needs improvement. From the perspective of printing costs, flexographic printing is more economical when printing small-volume products, and gravure printing is more suitable for large-volume printing. However, no matter which printing method is adopted, considering the characteristics of flexible packaging products, it is generally expected that the printing equipment can meet the following requirements: (1) capable of handling various printing materials with different properties; (2) capable of achieving the desired printing quality; 3) In view of the fact that most flexible packaging products are produced in large quantities, to ensure the consistency of the color of printed products, the downtime of the equipment should be minimized in the process of use; (4) The overall energy consumption of the equipment should be low; (5) From the perspective of environmental protection For starting, the equipment should adopt a closed structure and have a waste solvent recovery device.
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