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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products
2.84mm Analog Photopolymer Plate for Printing Corrugated Carton
  • Item NO.:

    ALD-R284H
  • Payment:

    30% T/T deposit,70% T/T before Shipping
  • Market Price:

    62
  • Price:

    58/60/sqaure meter
  • Product Origin:

    Jiangsu
  • Color:

    Light Red
  • Shipping Port:

    Shanghai
  • Lead Time: 

    20 workdays
contact now
Product Description

1.Item

Photopolymer Flexographic Printing Plate 2.84mm thickness

 

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 R394-II R284H R228-II R170H
Thickness(mm) 3.94mm 2.84mm 2.28mm 1.70mm
Rigidity(Shore A) 41-45 58-62 55-58 72-73
Recommend relief depth(mm) 1.8-2.0 1.0-1.4 1.0-1.2 0.7-0.9
Image reproduction 5%~95% 2%~95% 2%~95% 2%~95%
Maximum line line/inch 100 120 133 150
Minimum isolated line 0.3mm  0.175mm  0.15mm  0.10mm 
Minimum isolated dot 0.50mm  0.25mm  0.20mm  0.20mm 
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 Corrugated board, thick board,paper Label, flexible package, carry bag, folded paper box and beverage package Label, flexible package, carry bag, folded paper box and beverage package  Film, Label, flexible package, carry bag, folded paper box and beverage package   
Storage—raw plates

Unexposed plates should be stored in cool areas (4-32°C)away from heat. The plates must be placed flatly, and protected from contacting UV light. It is recommended to unpacked and handled in yellow light.
Storage—finished Plates Printing plate should be avoid excessive white light, irradiating from sunlight and exposing in high concentrated ozone environments for a long time either. After being unloaded, the plates should be cleaned thoroughly.
Guarantee Period


Under the recommended storage condition, guarantee period of Flexographic Printing Plate is 12 months.
Packing 60"*30"(1524mm*762mm), 8 pcs/ctn
40"*30"(1016mm*762mm), 8 pcs/ctn
42"*60"(1067mm*1524mm), 8 pcs/ctn
80"*50"(2032mm*1270mm), 6 pcs/ctn 80"*50"(2032mm*1278mm), 10 pcs/ctn

 

4.Process parameters

Type

R394-II

R284H

R228-II

R170H

Thickness( mm)

3.94

2.84

2.28

1.70

Back exposure(seconds)

35-70

25-40

35-55

15-21

Main exposure(minutes)

8-20

8-20

8-20

10-18

Rinsing(minutes)

5-7

5-7

5-7

5-7

Minimum drying time(hourrs)

1.5-2

1.5-2

1.5-2

1.5-2

Detackfying(minutes))

5-7

8-15

5-7

5-8

Post exposure(minutes)

3-5

5

5

5

 

5.Usage Scope

 

 

6.Packing

 

7.Processing

 

Please feel free to contact me online or send me a message if you are interested in our products, thank you!

inquiry now
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