News
  • Advantages of Flexographic Printing 21-04-09

    Flexography remains the most commonly used print process in the label industry. There can be no flexo label without the proper plate and therefore the proper plate making equipment. Industry leaders have stayed on top of the trends, ensuring that labels are printed in the quickest timeframe and with the highest quality. Printing is done using flexible sheets, which were initially made from natural rubber, then synthetic rubber and now mainly from photosensitive polymers. Flexographic printing is done on paper, cardboard or plastic film. Liquid inks with low viscosity are used for printing. These include water-based inks, solvents and ultraviolet (UV) curing inks. Non-absorbent substrates (films) are mainly printed using UV and solvent-based inks, but water-based inks are increasingly used due to their ecological aspects and increasing adaptability. Flexographic Printing Flexographic printing, or Flexo, is a technique for bulk printing using flexible relief plates. The manufacturer applies the ink first on the plate and then on the surface. This is a low-cost printing method, and it has progressed much since 1970 after direct laser engraving was introduced. Lithographic printing or Litho is a method of printing, initially based on the unmixable materials of oil and water. Lithography is used for anything that needs vibrant colours and is printed in large quantities. However, the printing method you’re employing needs to be useful as well as cost-effective. For custom printing, flexographic vs lithographic is an age-old debate, as these two are conventional methods in the printing and packaging industry. Nonetheless, when we speak of corrugated boxes, we need then in bulk. Bulk printing is a tedious task and does require some level of optimization. Factors like budget at hand, time constraints, quality of the print, and how boxes are going to be used - shipping or retail come into play. Printing Process Flexographic printing requires an initial setup cost. Flexo uses flexible plates mounted on a cylinder. The manufacturer uses a partially immersed ink roller to apply ink on an anilox roll. The anilox roll is a hard cylinder, usually made from steel or aluminium with a ceramic outer layer that comes with many dimples. The manufacturer uses the anilox to distribute the ink on the flexo printing plate uniformly. In the flexographic printing process, the ink is metered onto the surface of the plate by an engraved/etched roller of chrome or ceramic similar to a gravure cylinder but with a uniform distribution of cells (size, shape and depth). This roller is called an ‘anilox’. The corrugated boards run directly between the impression cylinder and the paint roller. Finally, the manufacturer runs the substrate through a dryer to prevent smudging. Flexographic printing is used on everything from food wrappers to secondary containers, such as cereal boxes to shipping cartons. The photopolymerizable material on a flexographic printing plate cross-links when ...

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  • Flexographic Product Packaging Design 21-03-23

    Digital flexographic printing is a plate making technology that uses a laser to directly expose the flexographic photosensitive polymer plates. It has the following advantages. Advantages of digital flexographic printing  ①The process is simple and the preparation time is greatly reduced. ②Exposure time is independent of pattern type and dot density. ③Replacing the separation sheet with shaded metameric material eliminates the dot distortion caused by the separation sheet processing. ④The main exposure, there is no diffuse reflection of light caused by the phenomenon of dot gain, you can get a clear dot. ⑤ Realization of direct plate making without soft film, the layout will not be flooded with dirty spots and defective. From the characteristics of the digital flexographic printing plate , digital flexographic printing plate can obtain fine, clear and high quality flexo plates. Therefore, in order to improve the quality of flexo printing, the use of digital flexographic printing plate is imperative. In order to make the designed products meet the printing requirements, flexographic product packaging design staff should pay attention to the following points when designing. 1. In the use of color, should be as simple, bright, bright colors If the design of the product overprinting too many colors, will cause the color dim. Due to the larger amount of flexo printing dot expansion, small dot loss is more serious, the pattern in a certain area overprinted color version too much, each color version of the problem of dot expansion or loss, dot expansion or extinction network phenomenon will be repeatedly flooded, making the picture dim, the lack of highlights and the middle tone sector, dot transition uneven, very disgraceful. Therefore, in the same full expression of the design of the draft conditions, should be as far as possible to reduce the number of printed colors to a minimum, which is very beneficial for the bulk production of printing manipulation, quality control and cost control. 2. Try to use spot colors to make up for the lack of four-color printing Many customers of packaging products always ask the design staff in the design of their products made of yellow, magenta, cyan, black four colors overprinted more than ten colors of the manuscript, but sometimes not only through the three primary colors or conventional four colors can simply show the entire color world, additional ports with a spot color long and short necessary, but also long and short an effective method. One-sided exaggerated overprinting overlay color is not desirable. Flexographic printing machine is ideal for printing large areas of the field and spot colors, flexographic printing machine mostly six or eight colors, only four colors will cause the unit idle, and four-color printing effect than offset or gravure, affecting the quality of flexographic products. 3. Should not use too fine lines and too smal...

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  • What Are Flexographic Printing Plates? 21-03-11

    Flexographic printing plates are flexible photopolymer plates used in flexographic printing to transfer ink and images onto a flexible substrate, such as paper or film. The printing plate is the key element of the flexographic printing process and the quality of the printed image depends to a large extent on the quality of the flexographic plate used. The flexographic process itself is renowned for its adaptability to printing on all types of flexible substrates, and the plate can be used and reused in millions of impressions. Here you will learn how the plates are made and how they function. The plates are carefully designed, which means that the printing surface is raised where the image is exposed. After the ink has been applied to the plate, the plate surface is the only area that comes into contact with the substrate. The area that is etched or embossed does not come into contact with the ink. Flexographic printing was originally made from rubber, but today it is made in sheet form from a photosensitive polymeric material, which distinguishes it from the fixed metal printing plates of offset printing. The plates are flexible enough to be wrapped around a cylindrical printing/plate roller. Plate processing 1) Traditional method The desired image is first exposed to the negative film using a laser phototypesetter. It is then placed directly on the surface material of the unexposed plate and held in place by a vacuum cover. The plate and film are then exposed to UV light to fix the image into the polymer material. Only the transparent areas of the negative will allow UV light to pass through, thus allowing the UV light to alter the molecular bonds in the photosensitive polymer material.  After sufficient exposure time, the plate is fixed to an oscillating platform and then immersed in a rinse tank. The rinsing solution can be water or solvent, depending on the type of plate. The unexposed areas of the polymer are then rinsed off the plate base by means of a rinsing brush. The waste polymer is dissolved into the rinse solution and then disposed of for recycling/solvent recovery. After the rinsing process, the plate is placed in a hot air dryer where the excess water/solvent is evaporated, leaving a dry plate. Post-curing with both UVA and UVC lamps is then required, after which the finished plate is ready for use. 2) Digital printing plates Today, most flexographic plates are exposed using direct "computer-to-plate" technology (CTP). In this case, the unexposed negative film is pre-laminated to a photosensitive polymer sheet so that both layers can be exposed in the same device. A computer-guided laser first exposes the negative layer and then exposes the photosensitive polymer to a UVA light source. This exposure technique produces a higher quality plate than conventional methods. The exposed plate is then processed using the processing method described above. 3)Thermal processing of flexographic plates As mentioned above, although exposur...

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News
What Are the Advantages of CTP?

2021-03-02

Admin

For large printing equipment printing plates, there are four types of CTP plates on the market: thermal, silver salt, photopolymer and treatment-free.  

CTP plate making technology is divided into: photosensitive CTP plate making technology and thermal CTP plate making technology.

Light sensitive CTP plates include silver salt diffusion plates, high sensitivity resin plates and silver salt/PS plates; heat sensitive CTP plates include thermal crosslinking plates, thermal ablation plates and thermal transfer plates. 

The advantages of CTP

The advantages of CTP are many, and two of the most significant are highlighted here. One is that a comparison of the appearance of digital flexographic printing plate with that of conventional plates reveals that the former plates have a much smoother surface, with the various elements of the print, from the separated dots to the field to the small dots in the fine highlight areas, almost entirely on one plane. With conventional flexographic plates, on the other hand, the fine dots in the highlight area usually protrude more than the rest of the plate, and even after retouching, the tops of these dots are several microns higher than the field section on the same plate, meaning that the dots in the highlight area are flattened during the printing process before the field section is fully printed, resulting in more severe dot enlargement. In contrast, CTP plates offer more consistent printing characteristics, effectively reducing dot gain.

Flexographic Photopolymer Plate

In addition, the size of all image areas on the CTP plate is reduced by a small amount during imaging, which means that every line, every field area and especially the dots are reduced by a few microns, effectively compensating for dot gain during the printing process. As this size reduction process is automatically integrated into the actual production, there is no negative impact on the pre-press workflow and image quality. In contrast, both of these are inevitably affected in the conventional version, as the size reduction is applied manually to the film as an intermediate process.
The dots in flexo printing are extremely important, especially the smallest ones that are produced. In these areas, some ghosting may occur that affects the quality of the flexo plate. This is mainly attributable to the way modern prepress systems process image data, independent of whether a digital or conventional workflow is used, so its solution can be applied to both flexo plate production processes.

Photographic resin flexo plates are imaged with the help of a negative image sensitisation mask. When a conventional plate is exposed, it is a negative image film, whereas in CTP it is a mask. On a screened negative image, the tiniest dots are the smallest light-transmitting holes that logically allow the smallest amount of UV light to pass through and complete the photopolymerisation reaction. If the required UV light is not strong enough, then the dot size is too small and only partial photopolymerisation occurs, causing the dot to be destroyed during development with a water-based solvent, resulting in what is known as a "stub" on the printing plate. Whether or not these dots can be printed depends on their height and is somewhat arbitrary, thus affecting the overall image quality.

The information is provided by the digital flexographic printing plate supplier.

New products
  • Plate making machine
    aolide brand flexographic printing plate making machine

    1.Introduction: a.The series equipments including washing/exposure/de-tacker/drying unit. The upper unit is washing unit, and then is exposure unit,detacker unit,drying unit.  b.This equipment is the shell adopts # 304 stainless steel manufacturing, strong, beautiful and durable. c.The way of wash is to rotate brush,the benefits of rotate brush is: when wash plate you also can stir solvent, makes solvent more evenly; Not only the brush pressure can be adjusted, and the pressure of solid plate of the platform also can adjust.It  it helps to make more fine flexible plate. Rather than the brush of rotating machine wash plate not have this feature.  d.Exposure using imported UVA lamp, This unit configuration radiator thermostatic tubes. Can ensure the precision of the plate making, prevent high temperature heat led to breathe in unstable conditions. e.Light treatment unit is using imported UVC lights (if the size of the equipment is small, UVC lamp is made in China, because the lamp of no small import UVC size). Light treatment by corrosion durable drawer of epoxy board, prevent ozone corrosion of metal. This unit configuration powerful exhaust device, used for discharge light processing caused ozone. f.Drying unit is set 2 drawer drying, the hot air circulation structure, can guarantee that all around the evenness of temperature, temperature than ≤±5℃ negative difference within. Automatic timing, automatic constant temperature, and alarm, configure automatic constant temperature exhaust function, and can effectively guarantee and the drying temperature conditions, automatic emissions caused by dry timely and penetration in the flexible plate of ozone in chemical solvents, the drying speed, the energ...

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  • Photopolymer Plate
    aolide 2.84mm thickness solid analog flexo photopolymer printing plate

    1- Item aolide 2.84mm thickness solid analog flexo photopolymer printing plate   2- Description 1)Excellent dot and isolated line reproduction 2)Solid printing performance 3)High latitude of exposure and processing 4)Good ink transfer 5)High impression   3-Technical Parameters Type:R284-II Thickness(mm):2.84 Rigidity(Shore A):46 Recommend relief depth(mm):1.0-1.4 Image reproduction:2%-95% Maximum line line/inch:120 Minimum isolated line:0.175mm (0.007inch) Minimum isolated dot:0.25mm (0.01inch) Suitable ink:Suitable for water and alcohol-based ink, incompatible with oil-based ink, hydrocarbon solvent or the ink containing ethyl acetate of more than 25% Mainly applicable field:Label、 Flexible package、Carry bag、 Folded paper box、Napkin、Beverage package 4- Process parameters Type:R284-II Thickness(mm):2.84 Back exposure(seconds):25-40 Main exposure(minutes):8-20 Rinsing(minutes):5-7 Minimum drying time(hours):1.5-2 Detackfying(minutes):5-7 Post exposure(minutes):3-5 1) Platemaking conditions: light of 80 watts (9.7mW/cm2 under 365nm), platesetter temperature 24-30 °C.  2) All the above data is depended on our plate-making device. Due to the different requirements of plate-making device, UV lamp power, relief depth and print image, the above recommended time can be changed appropriately. Customers should test on their own device for optimum plate quality. 

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  • Photopolymer Plate
    aolide 2.84mm thickness analog flexo photopolymer printing plate

    1- Item aolide 2.84mm thickness analog flexo photopolymer printing plate   2- Description 1)Excellent dot and isolated line reproduction 2)Solid printing performance 3)High latitude of exposure and processing 4)Good ink transfer 5)High impression   3-Technical Parameters Type:R284-II Thickness(mm):2.84 Rigidity(Shore A):46 Recommend relief depth(mm):1.0-1.4 Image reproduction:2%-95% Maximum line line/inch:120 Minimum isolated line:0.175mm (0.007inch) Minimum isolated dot:0.25mm (0.01inch) Suitable ink:Suitable for water and alcohol-based ink, incompatible with oil-based ink, hydrocarbon solvent or the ink containing ethyl acetate of more than 25% Mainly applicable field:Label、 Flexible package、Carry bag、 Folded paper box、Napkin、Beverage package 4- Process parameters Type:R284-II Thickness(mm):2.84 Back exposure(seconds):25-40 Main exposure(minutes):8-20 Rinsing(minutes):5-7 Minimum drying time(hours):1.5-2 Detackfying(minutes):5-7 Post exposure(minutes):3-5 1) Platemaking conditions: light of 80 watts (9.7mW/cm2 under 365nm), platesetter temperature 24-30 °C.  2) All the above data is depended on our plate-making device. Due to the different requirements of plate-making device, UV lamp power, relief depth and print image, the above recommended time can be changed appropriately. Customers should test on their own device for optimum plate quality. 

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  • Digital flexographic photopolymer plate
    3.94mm thickness black digital flexographic resin photopolymer plate

    1.Item 3.94mm thickness black digital flexographic resin photopolymer plate   2.Description 1)Excellent dot and isolated line reproduction 2)Solid printing performance 3)High latitude of exposure and processing 4)Good ink transfer 5)High impression 3.Technical parameters Use: Flexo Printing                            Material: Photosensitive Resin Style: Negative                                    Type: Flexographic Printing Plate Brand Name: AOLIDE                      Place of Origin: China (Mainland) Model Number: DR394-III                  Color: Black Thickness: 3.94mm                           Rigidity(Shore A): 36-38 Maximum line line/inch: 100                     Recommend relief depth(mm): 1.8-2.0  Image reproduction: 2%~98% Minimum isolated line: 0.2mm (0.008inch) Minimum isolated dot: 0.4mm(0.016inch) Main Application:Label、 Flexible package、Carry bag、 Folded paper box、Napkin、Beverage package 4.Process Parameters Type:DR394-III                                  Thickness(mm):3.94 Back exposure(seconds):50-70     Main exposure(minutes):12-20 Rinsing(minutes):5-8                        Minimum drying time(hours):1.5-2 Detackfying(minutes):5-8                Post exposure(minutes):5

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  • Photopolymer Plate
    aolide thickness 2.84mm analog photopolymer printing plate

    1- Item aolide thickness 2.84mm analog photopolymer printing plate   2- Description 1)Excellent dot and isolated line reproduction 2)Solid printing performance 3)High latitude of exposure and processing 4)Good ink transfer 5)High impression   3-Technical Parameters Type:R284-II Thickness(mm):2.84 Rigidity(Shore A):46 Recommend relief depth(mm):1.0-1.4 Image reproduction:2%-95% Maximum line line/inch:120 Minimum isolated line:0.175mm (0.007inch) Minimum isolated dot:0.25mm (0.01inch) Suitable ink:Suitable for water and alcohol-based ink, incompatible with oil-based ink, hydrocarbon solvent or the ink containing ethyl acetate of more than 25% Mainly applicable field:Label、 Flexible package、Carry bag、 Folded paper box、Napkin、Beverage package 4- Process parameters Type:R284-II Thickness(mm):2.84 Back exposure(seconds):25-40 Main exposure(minutes):8-20 Rinsing(minutes):5-7 Minimum drying time(hours):1.5-2 Detackfying(minutes):5-7 Post exposure(minutes):3-5 1) Platemaking conditions: light of 80 watts (9.7mW/cm2 under 365nm), platesetter temperature 24-30 °C.  2) All the above data is depended on our plate-making device. Due to the different requirements of plate-making device, UV lamp power, relief depth and print image, the above recommended time can be changed appropriately. Customers should test on their own device for optimum plate quality. 

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  • Digital flexographic photopolymer plate
    Thickness 3.94mm digital flexographic photopolymer plate

    1.Item Thickness 3.94mm digital flexographic photopolymer plate   2.Description 1)Excellent dot and isolated line reproduction 2)Solid printing performance 3)High latitude of exposure and processing 4)Good ink transfer 5)High impression 3.Technical parameters Use: Flexo Printing                            Material: Photosensitive Resin Style: Positive                                    Type: Flexographic Printing Plate Brand Name: AOLIDE                      Place of Origin: China (Mainland) Model Number: DR394-III                  Color: Black Thickness: 3.94mm                           Rigidity(Shore A): 36-38 Maximum line line/inch: 100                     Recommend relief depth(mm): 1.8-2.0  Image reproduction: 2%~98% Minimum isolated line: 0.2mm (0.008inch) Minimum isolated dot: 0.4mm(0.016inch) Main Application:Label、 Flexible package、Carry bag、 Folded paper box、Napkin、Beverage package 4.Process Parameters Type:DR394-III                                  Thickness(mm):3.94 Back exposure(seconds):50-70     Main exposure(minutes):12-20 Rinsing(minutes):5-8                        Minimum drying time(hours):1.5-2 Detackfying(minutes):5-8                Post exposure(minutes):5

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  • Photopolymer Plate
    aolide 1.14mm analog flexographic flexo photopolymer plate

    1- Item Name aolide 1.14mm analog flexographic flexo photopolymer plate   2- Description 1)Excellent dot and isolated line reproduction 2)Solid printing performance 3)High latitude of exposure and processing 4)Good ink transfer 5)High impression   3-Technical Parameters Type:R114LS Thickness(mm):1.14 Rigidity(Shore A):69-70 Recommend relief depth(mm):0.6-0.7 Image reproduction:2%-95% Maximum line line/inch:150 Minimum isolated line:0.10mm (0.004inch) Minimum isolated dot:0.20mm (0.0079inch) Suitable ink:Suitable for water , alcohol-based ink and UV-ink Mainly applicable field:Film、Label、flexible package、 Beverage package printing and varnish 4- Process parameters Type:R114LS Thickness(mm):1.14 Back exposure(seconds):35-60 Main exposure(minutes):10-18 Rinsing(minutes):5-7 Minimum drying time(hours):1-1.5 Detackfying(minutes):5-7 Post exposure(minutes):5 1) Platemaking conditions: light of 80 watts (9.7mW/cm2 under 365nm), platesetter temperature 24-30 °C.  2) All the above data is depended on our plate-making device. Due to the different requirements of plate-making device, UV lamp power, relief depth and print image, the above recommended time can be changed appropriately. Customers should test on their own device for optimum plate quality.     5-Usage Scope   6-Dimension & Packing Type:R114LS 762mm×1016mm   (30"×40") 900mm×1200mm   (35.4"×47.2") 1067mm×1524mm  (42"×60") 1067mm×2032mm  (42"×80") 1200mm×2032mm  (47.2"×80") 1270mm×2032mm   (50"×80")    

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  • Photopolymer plate
    Third Generation 3.94mm Thickness Flexible Digital Flexographic Photopolymer Plate

    1.Item Third Generation 3.94mm Thickness Flexible Digital Flexographic Photopolymer Plate   2.Description 1)Excellent dot and isolated line reproduction 2)Solid printing performance 3)High latitude of exposure and processing 4)Good ink transfer 5)High impression 3.Technical parameters Use: Flexo Printing                            Material: Photosensitive Resin Style: Positive                                    Type: Flexographic Printing Plate Brand Name: AOLIDE                      Place of Origin: China (Mainland) Model Number: DR394-III                  Color: Black Thickness: 3.94mm                           Rigidity(Shore A): 36-38 Maximum line line/inch: 100                     Recommend relief depth(mm): 1.8-2.0  Image reproduction: 2%~98% Minimum isolated line: 0.2mm (0.008inch) Minimum isolated dot: 0.4mm(0.016inch) Main Application:Label、 Flexible package、Carry bag、 Folded paper box、Napkin、Beverage package 4.Process Parameters Type:DR394-III                                  Thickness(mm):3.94 Back exposure(seconds):50-70     Main exposure(minutes):12-20 Rinsing(minutes):5-8                        Minimum drying time(hours):1.5-2 Detackfying(minutes):5-8                Post exposure(minutes):5

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  • Photopolymer plate
    2.84mm Digital Analog Flexographic Photopolymer Printing Polymer Plate

    1.Item 2.84mm Digital Analog Flexographic Photopolymer Printing Polymer Plate   2.Description 1)Excellent dot and isolated line reproduction 2)Solid printing performance 3)High latitude of exposure and processing 4)Good ink transfer 5)High impression 3.Technical parameters Use: Flexo Printing                 Material: Photosensitive Resin Style: Positive                         Type: Flexographic Printing Plate Place of Origin: China (Mainland)          Brand Name: AOLIDE Model Number: DR284-II                        Color: Black Thickness: 2.84mm                                 Rigidity(Shore A): 45-48 Maximum line line/inch: 120                     Recommend relief depth(mm): 1.0-1.4  Image reproduction: 2%~98% Minimum isolated line: 0.15mm (0.006inch) Minimum isolated dot: 0.25mm(0.01inch) Main Application:Label、 Flexible package、Carry bag、 Folded paper box、Napkin、Beverage package 4.Process Parameters Type:DR284-II                                  Thickness(mm):2.84 Back exposure(seconds):25-40     Main exposure(minutes):12-20 Rinsing(minutes):5-8                        Minimum drying time(hours):1.5-2 Detackfying(minutes):5-8                Post exposure(minutes):5

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  • Photopolymer plate
    High Hardness 1.7mm Digital Flexographic Polymer Plate

    1.Item High Hardness 1.7mm Digital Flexographic Polymer Plate   2.Description 1)Excellent dot and isolated line reproduction 2)Solid printing performance 3)High latitude of exposure and processing 4)Good ink transfer 5)High impression 3.Technical parameters Use: Flexo Printing                            Material: Photosensitive Resin Style: Positive                                    Type: Flexographic Printing Plate Brand Name: AOLIDE                      Place of Origin: China (Mainland) Model Number: DR170H                  Color: Black Thickness: 1.70mm                           Rigidity(Shore A): 70-72 Maximum line line/inch: 150                     Recommend relief depth(mm): 0.7-0.9  Image reproduction: 1%~98% Minimum isolated line: 0.10mm (0.004inch) Minimum isolated dot: 0.20mm(0.0079inch) Main Application:Film、Label、flexible package、carry bag,folded paper box,Beverage package printing 4.Process Parameters Type:DR170H                                  Thickness(mm):1.70 Back exposure(seconds):25-40     Main exposure(minutes):12-20 Rinsing(minutes):5-7                        Minimum drying time(hours):1.5-2 Detackfying(minutes):5-8                Post exposure(minutes):5

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  • Photopolymer plate
    Good Quality Performance 1.14mm Digital Flexographic Polymer Plate

    1.Item Good Quality Performance 1.14mm Digital Flexographic Polymer Plate   2.Description 1)Excellent dot and isolated line reproduction 2)Solid printing performance 3)High latitude of exposure and processing 4)Good ink transfer 5)High impression 3.Technical parameters Use: Flexo Printing                             Material: Photosensitive Resin Style: Positive                                    Type: Flexographic Printing Plate Brand Name: AOLIDE                      Place of Origin: China (Mainland) Model Number: DR114LS               Color: Black Thickness: 1.14mm                           Rigidity(Shore A): 69-72 Maximum line line/inch: 150                     Recommend relief depth(mm): 0.7-0.9  Image reproduction: 1%~98% Minimum isolated line: 0.10mm (0.004inch) Minimum isolated dot: 0.20mm(0.0079inch) Main Application:Film、Label、flexible package、 Beverage package printing and varnish  4.Process Parameters Type:DR114LS                                Thickness(mm):1.14 Back exposure(seconds):35-60     Main exposure(minutes):10-18 Rinsing(minutes):5-7                        Minimum drying time(hours):1-1.5 Detackfying(minutes):5-7                Post exposure(minutes):5

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  • Photopolymer plate
    2.84mm Digital Flexographic Printing Polymer Plate

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