This plate consists of an oil-repellent silicone surface layer, a photothermal conversion layer (light-absorbing layer), a oleophilic bottom layer, and a plate base. The silicone surface layer will constitute the final non-printing surface and will be removed under the effect of heat as the vaporization of the photothermal conversion layer, so that the underlying oleophilic layer is exposed as a printing surface that accepts ink.
The main function of the photothermal conversion layer is to absorb the light energy emitted by the scanning laser and effectively convert the absorbed light energy into heat energy so that the temperature of the plate surface rises to reach the vaporization temperature level. The substrate of the plate can be either a metal substrate (such as aluminum plate base) or a flexible polymer substrate (such as polyester film substrate) with a relatively wide adaptability. This type of plate can be printed immediately after laser scanning and imaging, and is therefore particularly suitable for on-machine platemaking systems. This is why a large number of direct image printing machines are equipped with such plates.
Although this plate is also a direct plate with no need for post-processing, it will generate ablation vapor and debris during the scanning and imaging process. Necessary measures shall be taken for sewage disposal, otherwise it will cause pollution to imaging optics and the environment. . In particular, waterless offset printing is not the only choice for hot ablation type direct plates. With appropriate structural changes, thermal ablation type direct plates can also be used for conventional Water-based offset printing.
Thermally cross-linked plates consist of a heat-sensitive coating and a hydrophilic plate base. The heat-sensitive coating is generally composed of a (alkali) water-soluble film-forming resin (eg, phenolic resin), a heat-sensitive cross-linking agent, and an infrared dye; the hydrophilic plate base can use the same aluminum plate base as the conventional PS plate.
The role of the infrared dye is to effectively absorb the light energy of the infrared laser light and convert the absorbed light energy into heat energy so that the temperature of the heat-sensitive coating can reach the reaction temperature of the heat-sensitive crosslinking agent; the effect of the heat-sensitive crosslinking agent It reacts with the film-forming resin under the effect of temperature to form a spatial network structure, thereby losing the water-solubility of the heat-sensitive coating. Due to the spatial cross-linking effect, the heat-sensitive coating of the exposed area remains in the plate as a lipophilic printing surface after the development process, and the unexposed area is removed so that the underlying hydrophilic plate becomes barely hydrophilic. Non-printing surface.
In order to further improve the effect of thermal cross-linking, some plates are often subjected to pre-heat treatment of the plate after exposure, thereby further deepening the thermal cross-linking effect (also an increase in the sensitivity of the increase in the mechanism). This type of plate is called a heat-crosslinked plate that requires preheating. The graphic area of ​​the thermal cross-linked plate is composed of a space-crosslinked polymer resin. Therefore, such plates usually have a very high mechanical strength and printability, and generally can print hundreds of thousands of copies, and are suitable for long-run printing. market.
Both thermal transfer plates and thermal phase change plates are processless CTPlates that can be printed without the need for chemical post-processing after imaging, and do not generate ablation debris during laser scanning imaging. And vapor and other waste, therefore, this type of plate is suitable for off-line plate-making, but also for direct plate-making, has received widespread attention.
The thermal transfer direct plate consists of a ribbon and an image receiving substrate. The imaged substrate itself has good hydrophilicity (e.g., the aluminum plate of a conventional PS plate), and the main role is to accept the hot wax layer transferred by the ribbon and construct a hydrophilic non-printing surface. The ribbon is composed of a heat-resistant macromolecule substrate and a heat-sensitive layer (thermal wax layer). The hot wax layer is composed of a low melting point polymer material and an infrared dye.
The ribbon is in close contact with the image substrate when it is imaged. The laser light energy is absorbed by the dye and converted into heat energy. The temperature of the heat sensitive layer causes the polymer of the hot wax layer to melt, thus transferring the “liquid†hot wax layer. On the receiving substrate, a printed graphic surface is formed.
In order to increase the mechanical strength of the image area, it is often necessary to cure the hot wax layer transferred on the surface of the image-bearing substrate at a higher temperature. The principle is to cross-link the hot wax layer to form a spatial network structure. Although this plate does not require post-development processing, the separation of the ribbon and the image-bearing substrate can cause inconvenience in use and control, adding to variable factors.
In contrast, the thermo-induced phase change of direct plates has advantages. This plate consists of a heat-sensitive coating and a supporting substrate. The heat-sensitive coating has sufficient hydrophilicity to be a non-printing surface, but it can be converted into a lipophilicity by the action of thermal energy and become a printed graphic surface. The substrate of this plate is only the support of the heat-sensitive coating and does not participate in the final printing. Therefore, there is no requirement for affinity. According to different purposes of use, it can be either a polymer substrate or a metal plate substrate.
A reusable media technology called LiteSpeed. LiteSpeed ​​is actually a polymer coating solution that can be sprayed on the surface of any substrate such as a plate or a plate cylinder to form a polymer film. Therefore, this polymer film is also known as Spray-on-Polymer. After the polymer film is sprayed and laser imaged, no post-processing is required for printing. After printing is completed, the polymer film can be easily washed off and the surface of the plate or plate cylinder can be restored to its original state. Since the support substrate can be reused, the sprayed polymer film is very suitable for direct plate making.
The main function of the photothermal conversion layer is to absorb the light energy emitted by the scanning laser and effectively convert the absorbed light energy into heat energy so that the temperature of the plate surface rises to reach the vaporization temperature level. The substrate of the plate can be either a metal substrate (such as aluminum plate base) or a flexible polymer substrate (such as polyester film substrate) with a relatively wide adaptability. This type of plate can be printed immediately after laser scanning and imaging, and is therefore particularly suitable for on-machine platemaking systems. This is why a large number of direct image printing machines are equipped with such plates.
Although this plate is also a direct plate with no need for post-processing, it will generate ablation vapor and debris during the scanning and imaging process. Necessary measures shall be taken for sewage disposal, otherwise it will cause pollution to imaging optics and the environment. . In particular, waterless offset printing is not the only choice for hot ablation type direct plates. With appropriate structural changes, thermal ablation type direct plates can also be used for conventional Water-based offset printing.
Thermally cross-linked plates consist of a heat-sensitive coating and a hydrophilic plate base. The heat-sensitive coating is generally composed of a (alkali) water-soluble film-forming resin (eg, phenolic resin), a heat-sensitive cross-linking agent, and an infrared dye; the hydrophilic plate base can use the same aluminum plate base as the conventional PS plate.
The role of the infrared dye is to effectively absorb the light energy of the infrared laser light and convert the absorbed light energy into heat energy so that the temperature of the heat-sensitive coating can reach the reaction temperature of the heat-sensitive crosslinking agent; the effect of the heat-sensitive crosslinking agent It reacts with the film-forming resin under the effect of temperature to form a spatial network structure, thereby losing the water-solubility of the heat-sensitive coating. Due to the spatial cross-linking effect, the heat-sensitive coating of the exposed area remains in the plate as a lipophilic printing surface after the development process, and the unexposed area is removed so that the underlying hydrophilic plate becomes barely hydrophilic. Non-printing surface.
In order to further improve the effect of thermal cross-linking, some plates are often subjected to pre-heat treatment of the plate after exposure, thereby further deepening the thermal cross-linking effect (also an increase in the sensitivity of the increase in the mechanism). This type of plate is called a heat-crosslinked plate that requires preheating. The graphic area of ​​the thermal cross-linked plate is composed of a space-crosslinked polymer resin. Therefore, such plates usually have a very high mechanical strength and printability, and generally can print hundreds of thousands of copies, and are suitable for long-run printing. market.
Both thermal transfer plates and thermal phase change plates are processless CTPlates that can be printed without the need for chemical post-processing after imaging, and do not generate ablation debris during laser scanning imaging. And vapor and other waste, therefore, this type of plate is suitable for off-line plate-making, but also for direct plate-making, has received widespread attention.
The thermal transfer direct plate consists of a ribbon and an image receiving substrate. The imaged substrate itself has good hydrophilicity (e.g., the aluminum plate of a conventional PS plate), and the main role is to accept the hot wax layer transferred by the ribbon and construct a hydrophilic non-printing surface. The ribbon is composed of a heat-resistant macromolecule substrate and a heat-sensitive layer (thermal wax layer). The hot wax layer is composed of a low melting point polymer material and an infrared dye.
The ribbon is in close contact with the image substrate when it is imaged. The laser light energy is absorbed by the dye and converted into heat energy. The temperature of the heat sensitive layer causes the polymer of the hot wax layer to melt, thus transferring the “liquid†hot wax layer. On the receiving substrate, a printed graphic surface is formed.
In order to increase the mechanical strength of the image area, it is often necessary to cure the hot wax layer transferred on the surface of the image-bearing substrate at a higher temperature. The principle is to cross-link the hot wax layer to form a spatial network structure. Although this plate does not require post-development processing, the separation of the ribbon and the image-bearing substrate can cause inconvenience in use and control, adding to variable factors.
In contrast, the thermo-induced phase change of direct plates has advantages. This plate consists of a heat-sensitive coating and a supporting substrate. The heat-sensitive coating has sufficient hydrophilicity to be a non-printing surface, but it can be converted into a lipophilicity by the action of thermal energy and become a printed graphic surface. The substrate of this plate is only the support of the heat-sensitive coating and does not participate in the final printing. Therefore, there is no requirement for affinity. According to different purposes of use, it can be either a polymer substrate or a metal plate substrate.
A reusable media technology called LiteSpeed. LiteSpeed ​​is actually a polymer coating solution that can be sprayed on the surface of any substrate such as a plate or a plate cylinder to form a polymer film. Therefore, this polymer film is also known as Spray-on-Polymer. After the polymer film is sprayed and laser imaged, no post-processing is required for printing. After printing is completed, the polymer film can be easily washed off and the surface of the plate or plate cylinder can be restored to its original state. Since the support substrate can be reused, the sprayed polymer film is very suitable for direct plate making.
Jia Teng Glass hanging vase is widely exported to the world market. They're a Hanging Glass vase and they're perfect for floating air plants, ornaments, tiny garden scenes, or painted with a votive candle. You families will surely love them! It is made of borosilicate glass that is very clear and delicate. Borosilicate glass is a strong heat-resistant glass traditionally used to make scientific lab glass. It is simply a different type of glass that is resistant to temperature swings and scratching. Because the particles are held together so tightly, borosilicate glass is resistant to temperature swings. Also it is BPA free and no lead &mercury.
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Hejian Jia Teng Glass Products Co., Ltd. , http://www.jtglassware.com