In the offset printing process, when printing full-size products in the field or in the field, the ink skin, ink roller dregs, paper stripping, hair loss, dirt, etc. are most likely to adhere to the surface of the ink layer, affecting the printing quality and appearance. . Because of the large format of offset full-plate printing, the ink used has a large amount of ink, and the ink also has a certain viscosity. In the full-print version, the impurities in the ink, ink roller and paper are easily revealed.
First, the cause of the formation of ink in the ink and the solution
Printing full version of the field, under normal circumstances are used offset printing quick-drying light ink. The offset printing ink is a dry type mainly composed of oxidized conjunctiva type drying. In the ink container, ink fountain, ink bucket and other containers, if the ink is in contact with the air for a long time, it will be covered with a layer of ink skin. Some of the inks in ink are caused by the use of new ink in old ink cartridges, and some are new ink surfaces or edges.
The crusts on the crust were not treated cleanly. They were adsorbed on the real map text during the printing process and reflected on the prints. The ink was black and the surrounding edges were white.
Solution:
1 In order to prevent the ink oxidized conjunctiva from drying the ink, under normal circumstances, after the unsealed ink cartridge is opened, pour some clean water into the ink box and the ink tank. The purpose is to prevent the ink from being exposed to the air to oxidize the conjunctiva.
2 After use, the ink cartridges and the ink on the surface of the ink tank are cleaned and smoothed with ink scoops. The surface of the inks should be cleaned out in time. Apply a layer of varnish to the surface of the ink. Apply a layer of kraft paper or other thick paper and cut it into a round shape (consistent with the diameter of the ink cartridge and the ink bucket). Apply lightly to the varnish. Above, then the ink cover is sealed, this method can also prevent the ink oxidation conjunctiva from playing the role of the ink.
3 The conditional printing company is best to design the ink room and special personnel to specialize in ink transfer and management work, so that those responsible and conscientious, dedicated and responsible masters are responsible for the deployment of the ink, so that the standard ink management can be eliminated. Ink wasted.
4 Too much ink in the ink, the printing of many editions on the ground is not good, and the ink should be replaced immediately.
5 Too much ink inside the ink can be put into the yarn pad, and press it down on the plate press to filter it. There is no platen machine to use the heavy object to make the ink filter reduce the ink skin.
Second, the ink roll off with the ink on the paper, the reasons and solutions
In the field printing, besides the ink sheet, the ink roll falling-off material easily sticks to the ink layer. The main reason is that the ink roller is used for a long time and the wear is aged. In addition, due to the lack of attention to the maintenance of the ink roller, the product is not often scrubbed clean after printing, and the surface of the ink roller is aged and smooth, resulting in numerous cracks. In the cracking area, irregular black blocks often fall off and are
Adhesion to the surface of the printing plate, transfer to the blanket, and finally reflected on the ink layer of the print. The ink roller drop-offs are irregular triangles on the ink layer, black dots in the middle, and white circles around the drop-offs, which outline the shape of the drop-off.
Solution: There are two kinds of hard and soft ink rollers for inking parts. Hard ink rollers are generally ink rollers and metal is not easy to damage. Soft ink roller is mainly made of nitrile rubber, which is easy to expand and deform. , Dry surface conjunctiva or aging cracks, etc., affect the normal transmission of ink. In order to prevent the ink roller falling off from affecting the quality of the printed product, it is important to enhance routine maintenance and proper use.
1 The ink roller should always be kept clean and clean. After a product is printed, on holidays, the ink roller should be cleansed and wiped cleanly, leaving no ink and debris to avoid surface conjunctiva.
2 The aging of the ink roller is mainly caused by light and heat. Ink roller can not be placed in the sun, or near the hot gas, radiator, to prevent the aging of the surface, or ink stick softening. The ink roller is placed on the ink roller wooden frame when it is not in use, and it is in a dry and cool place.
3 Do not touch with non-volatile oils for a long time. Such as oil, varnish, butter, etc. should not be in contact with the ink roller for a long time, otherwise it is prone to swell and deformation of the roller surface.
4 The ink roller should avoid the phenomenon of rotten glue and dregs caused by the erosion of offset dampening fluid. Offset wetting fluid is a weakly acidic substance containing surfactants, wetting agents, emulsifiers and other substances. Do not fill the water tank with wetting fluid, or spill it on the ink roller or the water is too large. The wetting fluid chemical erodes the ink roller.
5 The method of eliminating the ink roll falling off is generally used artificial and mechanical grinding to remove the conjunctiva and rotten glue layer. However, pay attention to the diameter of the ink roller and do not polish it too much. If the ink roller is badly damaged by aging, it is best to replace the aging rubber roller and use a new ink roller to ensure the quality of the printed product.
Third, the cause of the paper falling off, dirt and solutions
When printing products in the field, the shedding, dirt, and depilation on the paper will affect the quality of the ink product. The main reason is that paper is attached to the paper surface during papermaking because the paper is used in papermaking raw materials, auxiliary materials, and hard paste blocks, plastics, debris, scales, and insects in the papermaking process. These paper dropouts are transferred from the blanket to the paper. The shape of the print is white circles around it, with burrs and irregular patterns.
Solution:
1 Strictly control the receipt of paper, and the unqualified paper does not enter the factory and is not stored in the warehouse. The quality of paper directly affects the quality of printed products.
2 The paper is hung and adjusted before offset printing. On the one hand, the water content of the paper can be evenly distributed, and the expansion and contraction of the paper can be reduced, which is conducive to accurate overprinting; on the other hand, the paper can be adjusted by hanging, the blower blows the paper, and the paper is dusted. , debris, small pieces of paper, etc., blow clean, reduce the paper off the stain, stick to the ink layer.
3 if the paper off powder, lint can be printed before printing a clean water, white oil treatment, offset printing and blanket printing methods.
4 Add some detackifying agent to the ink to reduce the viscosity of the ink and prevent the disadvantages of the old hair that the paper removes powder.
Print magazine
First, the cause of the formation of ink in the ink and the solution
Printing full version of the field, under normal circumstances are used offset printing quick-drying light ink. The offset printing ink is a dry type mainly composed of oxidized conjunctiva type drying. In the ink container, ink fountain, ink bucket and other containers, if the ink is in contact with the air for a long time, it will be covered with a layer of ink skin. Some of the inks in ink are caused by the use of new ink in old ink cartridges, and some are new ink surfaces or edges.
The crusts on the crust were not treated cleanly. They were adsorbed on the real map text during the printing process and reflected on the prints. The ink was black and the surrounding edges were white.
Solution:
1 In order to prevent the ink oxidized conjunctiva from drying the ink, under normal circumstances, after the unsealed ink cartridge is opened, pour some clean water into the ink box and the ink tank. The purpose is to prevent the ink from being exposed to the air to oxidize the conjunctiva.
2 After use, the ink cartridges and the ink on the surface of the ink tank are cleaned and smoothed with ink scoops. The surface of the inks should be cleaned out in time. Apply a layer of varnish to the surface of the ink. Apply a layer of kraft paper or other thick paper and cut it into a round shape (consistent with the diameter of the ink cartridge and the ink bucket). Apply lightly to the varnish. Above, then the ink cover is sealed, this method can also prevent the ink oxidation conjunctiva from playing the role of the ink.
3 The conditional printing company is best to design the ink room and special personnel to specialize in ink transfer and management work, so that those responsible and conscientious, dedicated and responsible masters are responsible for the deployment of the ink, so that the standard ink management can be eliminated. Ink wasted.
4 Too much ink in the ink, the printing of many editions on the ground is not good, and the ink should be replaced immediately.
5 Too much ink inside the ink can be put into the yarn pad, and press it down on the plate press to filter it. There is no platen machine to use the heavy object to make the ink filter reduce the ink skin.
Second, the ink roll off with the ink on the paper, the reasons and solutions
In the field printing, besides the ink sheet, the ink roll falling-off material easily sticks to the ink layer. The main reason is that the ink roller is used for a long time and the wear is aged. In addition, due to the lack of attention to the maintenance of the ink roller, the product is not often scrubbed clean after printing, and the surface of the ink roller is aged and smooth, resulting in numerous cracks. In the cracking area, irregular black blocks often fall off and are
Adhesion to the surface of the printing plate, transfer to the blanket, and finally reflected on the ink layer of the print. The ink roller drop-offs are irregular triangles on the ink layer, black dots in the middle, and white circles around the drop-offs, which outline the shape of the drop-off.
Solution: There are two kinds of hard and soft ink rollers for inking parts. Hard ink rollers are generally ink rollers and metal is not easy to damage. Soft ink roller is mainly made of nitrile rubber, which is easy to expand and deform. , Dry surface conjunctiva or aging cracks, etc., affect the normal transmission of ink. In order to prevent the ink roller falling off from affecting the quality of the printed product, it is important to enhance routine maintenance and proper use.
1 The ink roller should always be kept clean and clean. After a product is printed, on holidays, the ink roller should be cleansed and wiped cleanly, leaving no ink and debris to avoid surface conjunctiva.
2 The aging of the ink roller is mainly caused by light and heat. Ink roller can not be placed in the sun, or near the hot gas, radiator, to prevent the aging of the surface, or ink stick softening. The ink roller is placed on the ink roller wooden frame when it is not in use, and it is in a dry and cool place.
3 Do not touch with non-volatile oils for a long time. Such as oil, varnish, butter, etc. should not be in contact with the ink roller for a long time, otherwise it is prone to swell and deformation of the roller surface.
4 The ink roller should avoid the phenomenon of rotten glue and dregs caused by the erosion of offset dampening fluid. Offset wetting fluid is a weakly acidic substance containing surfactants, wetting agents, emulsifiers and other substances. Do not fill the water tank with wetting fluid, or spill it on the ink roller or the water is too large. The wetting fluid chemical erodes the ink roller.
5 The method of eliminating the ink roll falling off is generally used artificial and mechanical grinding to remove the conjunctiva and rotten glue layer. However, pay attention to the diameter of the ink roller and do not polish it too much. If the ink roller is badly damaged by aging, it is best to replace the aging rubber roller and use a new ink roller to ensure the quality of the printed product.
Third, the cause of the paper falling off, dirt and solutions
When printing products in the field, the shedding, dirt, and depilation on the paper will affect the quality of the ink product. The main reason is that paper is attached to the paper surface during papermaking because the paper is used in papermaking raw materials, auxiliary materials, and hard paste blocks, plastics, debris, scales, and insects in the papermaking process. These paper dropouts are transferred from the blanket to the paper. The shape of the print is white circles around it, with burrs and irregular patterns.
Solution:
1 Strictly control the receipt of paper, and the unqualified paper does not enter the factory and is not stored in the warehouse. The quality of paper directly affects the quality of printed products.
2 The paper is hung and adjusted before offset printing. On the one hand, the water content of the paper can be evenly distributed, and the expansion and contraction of the paper can be reduced, which is conducive to accurate overprinting; on the other hand, the paper can be adjusted by hanging, the blower blows the paper, and the paper is dusted. , debris, small pieces of paper, etc., blow clean, reduce the paper off the stain, stick to the ink layer.
3 if the paper off powder, lint can be printed before printing a clean water, white oil treatment, offset printing and blanket printing methods.
4 Add some detackifying agent to the ink to reduce the viscosity of the ink and prevent the disadvantages of the old hair that the paper removes powder.
Print magazine
Application:
- Commercial printing such as posters, maps, business cards, banners and tags
- Various kind of label facestock such as PSA labels, IML labes, wrap around labels and bar code labels
- Digital printing media such as dye/pigment/solvent/UV printing, laser printing and Indigo printing
- Stationery items such as file folders, calendars and shopping bags
- Various kind of plastic/paper material for rigid and soft packaging use
Feature:
1) Better stiffness than normal synthetic paper
2) Faster dry by using normal printing inks
3) Waterproof and tear resistance
4) Aging resistance and anti-corrosion
5) Sound quality and exporting services
6) Complete combustion and environmental protection
Waterproof Synthetic Paper,Matte Synthetic Paper,Glossy Synthetic Paper,Label PP Synthetic Paper
Shijiazhuang dadao Packaging materials Co , http://www.ddplasticfilm.com