News
  • What Are the Advantages of CTP? 21-03-02

    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. 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...

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  • What Is the Process of Flexo Digital Direct Plate Making? 21-02-22

    At present, flexo plate making methods are mainly divided into traditional plate making and digital direct plate making. Traditional plate in addition to the physical expansion of the network, there is also a plate soft film and plate close together when exposed to the optical expansion. Because of the diffuse reflection effect of UV light, all the graphics and dots will be expanded, so that the resolution of printing reproduction is reduced. Therefore, it is difficult to obtain the desired flexographic quality for printing using digital flexographic printing plate obtained from conventional plate making. What is the process of flexo digital direct plate making? Flexo digital direct plate making process is: digital imaging → back pre-exposure → main exposure → flushing erosion → drying → post-processing → post-exposure. ①Digital imaging Imaging of the plate is a special light polymer plate, the surface of which is compounded with a layer of metameric material with complete light blocking function. First, the plate to be used is installed on the cylinder of the digital plate making machine. During exposure, a computer-controlled infrared laser head moves in the direction of the cylinder to ablate the metameric material in the area to be imaged, exposing the photopolymeric photopolymeric layer of the plate below. Because the photopolymeric light-sensitive layer is not sensitive to infrared light, so the laser ablated where the light-sensitive material is not affected, while the parts not exposed to the laser still remain metameric material, thus forming an imaging stencil. ②Back pre-exposure The purpose of the back pre-exposure is to increase the thickness of the plate base to ensure that the printing required for the printing force. The thickness of the plate base and the back of the pre-exposure time is proportional to the longer the pre-exposure time, the thicker the plate base; vice versa, it is thin. ③Main exposure The main exposure can be carried out in the ordinary exposure machine. Because the metameric material and photographic resin fully compounded into one, acting as the role of the negative, so the exposure does not require vacuum, and the exposure time is short, average, the network does not deform. The main exposure, the exposed photosensitive resin layer to see the light hardening reaction, thus forming the image of the latent image, the photosensitive resin layer covered with basaltic material does not see the light, and does not occur photochemical reaction. ④Wash erosion The metaphorical material that is not ablated away by the laser and the unhardened photosensitive polymer under it are dissolved, forming a concave vacant sector; the photosensitive polymer at the hardened area that sees light is not dissolved, thus forming a floating convex graphic sector. ⑤Drying The flexible plate is slightly swollen and sticky and soft after erosion by washing due to the corrosion of solvent, the original straight line seems to be wavy, and t...

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  • Flexographic Versus Offset and Letterpress Printing 21-01-30

    Digital printing is currently gaining attention in the label industry. With the help of computer platforms, digital printing has unique features that are unmatched by other printing processes. In addition, digital printing's FM dots are a double-edged sword of cost and quality. Digital printing uses FM dots, but traditional printing basically uses AM dots. There is a situation where when we are marketing, because it is a short-run job, we tend to use digital printing, which is fast, low cost and has a very good sense of FM dots.The next digital flexographic printing plate supplier will explain the contrast between flexographic printing and offset printing and letterpress printing. Flexographic printing and offset printing, letterpress contrast 1. Flexographic printing process ① LOGO and logo colour stability of non-flexo printing. ② The number of digital flexographic printing plate plus network lines, the level of expression is lower than offset printing. ③ Dot expansion is smaller than letterpress printing, and the product texture is better than letterpress printing. ④ The integrity of the flexographic dot in the middle tone area is unmatched by offset printing, and the flat screen is flat and does not blossom. ⑤ The texture of metallic colours is very strong and incomparable to offset printing. 2. Offset printing process ① The number of lines of printing plate screening reaches 200 lines/inch, with the most delicate expression of layers. ② Sheet-fed multi-colour offset printing and web-fed rotary transfer flexo and letterpress printing compete on the same stage, and offset printing has the highest overprinting accuracy. ③ Colour difference control of spot colours and colour difference control of overprinted colours is more difficult. ④ The difficulty of ink and water balance control and poor dot integrity. ⑤ The dot leap and overlap near the critical point causes the unevenness of the flat screen. ⑥ To international brands of four-colour, five-colour sheet-fed offset printing equipment with rotary equipment, although the product printing quality is high, but in the product capacity, the level of raw material utilization, the cost of off-line processing after the comprehensive cost of comparison is clearly exposed shortcomings. 3. Letterpress process ① Loss of image level due to dot gain. ② Loss of colour density due to the letterpress ink path. ③ Although not bound by anilox conditions, the dot gain makes it impossible to challenge the high number of screening lines of offset printing. ④ Inadequate control of colour differences. ⑤ The stability of CMYK four-colour overprinting is not high. The key to winning in flexographic The flexographic process faces multiple challenges from other printing processes: the challenge of offset printing, which is good at highlighting small dots, the challenge of letterpress printing, which is good at low costs, and the challenge of gravure printing, which is good at long-running live pieces. Despite these chall...

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products
Thickness 3.94mm digital flexographic photopolymer plate
  • Item NO.:

    ALD-DR394-III
  • Payment:

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

    76
  • Price:

    76
  • Product Origin:

    CHINA
  • Color:

    Black
  • Shipping Port:

    Shanghai
  • Lead Time: 

    15 workdays
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Product Description

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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