In recent years, more and more small and medium-sized printing companies have used small-sized 8-open offset presses to print short-lived business. Because the eight-open offset press has features such as low price, low investment, quick effect, flexible operation, low printing consumption, and the ability to print thin paper, it is widely recognized and favored. Offset machines have great advantages, small and large, and they have their advantages. According to the actual work situation below, the differences between the octaves and offset presses are analyzed as follows:
One or eight open offset presses can print thin papers with a wide range of printability.
The biggest difference and advantage of the 8-fold offset press compared to the offset press is that the 8-fold offset press has a small format for printing paper, and even thin paper transport systems can smoothly transmit it. Therefore, the general miscellaneous and thinner 28g /m2 typing paper, 35 g/m2 relief paper and other forms, as long as the printing ink balance control, can be printed out, and the effect is also more ideal, which fully shows its adaptability and flexibility. Off-line offset presses and four-port offset presses are difficult to accept for thinner paper because of the large print size of the paper.
Two and eight open offset presses are cheap to print.
One off PS version, now on the market price of 20 yuan, while the price of an eight-on PS version is off 1/4 or 5 yuan; off a renewable PS version of a market price In about 10 yuan, a price of 2.50 yuan will be sold in the eight-bay reproduction. In particular, printing and short-lived editions, with thousands of prints and 10,000 impressions, and printing products that users require for timely delivery, the printing costs are relatively low. This is of positive significance for printing companies to increase production, save costs and reduce costs and consumption.
The difference between the three or eight open and offset printing imposition:
The eight open format, the large size is 43×31cm, the small size is 39×27cm, and the imposition process is usually performed before the printing, and the small-size version is made into an 8-open layout. With eight open formats, the number of blocks to be imposition will be less, thus saving time for imposition, reducing the consumption of imposition materials and electricity. Only need to fight the energies and time of the 1/4 version, you can complete the imposition, especially for the short version is very beneficial, convenient and time-saving, high efficiency.
The difference between four and eight open and split printing plates:
The size of the printing plate of the eight-opening offset printing press is 46×38 cm, and the size of the offset printing press of the offset printing press is 92×76 cm. The PS version of the octaves can be purchased directly as a finished product, or it can be cut into four pieces using a ruler and a cutting blade. In addition, the octave PS version has a small format, and it can be used to dry four pieces at the same time on the stencil printer, thereby reducing power consumption and improving work efficiency.
In the case of an eight-platen offset printing plate, the size of the graphic and nib location is 4 cm, and the size of the split printing plate and the nipping mouth is 7 cm, due to the eight-platen offset plate cylinder and the blanket cylinder. The diameter of the impression cylinder is correspondingly small, and the size and space of the drum are small when overprinting the printing plate. When printing, the side with a large size of the blank position should be used as the position of the bite.
Fifth, the small paper format, small expansion, and overprinting accuracy of the paper is one of the six major factors affecting the quality of printing. The quality of paper conditioning will directly determine the printing quality. Since offset printing is a unique printing method for water, the fountain solution is first coated on the printing plate. Water means that the paper is stretched and deformed by water. The size of the paper used for the printing press of the eight-open offset press is small, and the degree of telescopic deformation is also correspondingly small, which is conducive to overprinting accuracy. Before the printing, the paper is subjected to hanging and conditioning treatment so that the temperature and humidity on the paper are relatively consistent with the temperature and humidity of the printing environment in the workshop. When the paper is required to be flat and the cutting size is the same, and the errors of the straight angle and the straightness are relatively small, the four-color overprinting in the printing can achieve high accuracy and good quality.
The difference between the six and eight open and offset offset presses:
There are two methods for feeding the offset press, horizontal feed and straight feed, and only the cross feed mode for the boot. Most non-offset presses use continuous feed, while the octal offset press generally uses overfeed. The input of the paper is based on the friction between the upper and lower rolls and the paper is handed to the part of the rule. Pull gauges, side gauges and front gauges. At the same time, the nip of the impression cylinder also plays an important role. The paper is positioned once at the front gauge and the secondary positioning is performed at the impression cylinder. Therefore, when printing, pay attention to the influence of the left and right position of the paper on overprinting.
Seven or eight open offset printing machine:
The wetting methods used in the eight-ply offset press are mainly water-weave-laying plate wetting devices, ink-and-dye Dagren wetting devices and Kunpak direct wetting devices. In the printing process, the amount of water should be controlled according to different dampening modes. No matter what kind of water supply method, we must accurately control the size of the printing plate surface water in order to achieve ink and water balance. If the water volume is too small, it is easy to dirty the plate, and if the amount of water is too large, the ink emulsification phenomenon such as blotting ink and print matt will occur. The small dot water is easy to be washed away, and at the same time, the water volume of the paper fiber is too large and the telescopic deformation will affect the accurate overprinting. Do not appear water and big ink phenomenon, the ideal wetting layout, the normal water supply effect should be: In the premise of not dirty version, use the least amount of water, in order to protect the printing quality.
One or eight open offset presses can print thin papers with a wide range of printability.
The biggest difference and advantage of the 8-fold offset press compared to the offset press is that the 8-fold offset press has a small format for printing paper, and even thin paper transport systems can smoothly transmit it. Therefore, the general miscellaneous and thinner 28g /m2 typing paper, 35 g/m2 relief paper and other forms, as long as the printing ink balance control, can be printed out, and the effect is also more ideal, which fully shows its adaptability and flexibility. Off-line offset presses and four-port offset presses are difficult to accept for thinner paper because of the large print size of the paper.
Two and eight open offset presses are cheap to print.
One off PS version, now on the market price of 20 yuan, while the price of an eight-on PS version is off 1/4 or 5 yuan; off a renewable PS version of a market price In about 10 yuan, a price of 2.50 yuan will be sold in the eight-bay reproduction. In particular, printing and short-lived editions, with thousands of prints and 10,000 impressions, and printing products that users require for timely delivery, the printing costs are relatively low. This is of positive significance for printing companies to increase production, save costs and reduce costs and consumption.
The difference between the three or eight open and offset printing imposition:
The eight open format, the large size is 43×31cm, the small size is 39×27cm, and the imposition process is usually performed before the printing, and the small-size version is made into an 8-open layout. With eight open formats, the number of blocks to be imposition will be less, thus saving time for imposition, reducing the consumption of imposition materials and electricity. Only need to fight the energies and time of the 1/4 version, you can complete the imposition, especially for the short version is very beneficial, convenient and time-saving, high efficiency.
The difference between four and eight open and split printing plates:
The size of the printing plate of the eight-opening offset printing press is 46×38 cm, and the size of the offset printing press of the offset printing press is 92×76 cm. The PS version of the octaves can be purchased directly as a finished product, or it can be cut into four pieces using a ruler and a cutting blade. In addition, the octave PS version has a small format, and it can be used to dry four pieces at the same time on the stencil printer, thereby reducing power consumption and improving work efficiency.
In the case of an eight-platen offset printing plate, the size of the graphic and nib location is 4 cm, and the size of the split printing plate and the nipping mouth is 7 cm, due to the eight-platen offset plate cylinder and the blanket cylinder. The diameter of the impression cylinder is correspondingly small, and the size and space of the drum are small when overprinting the printing plate. When printing, the side with a large size of the blank position should be used as the position of the bite.
Fifth, the small paper format, small expansion, and overprinting accuracy of the paper is one of the six major factors affecting the quality of printing. The quality of paper conditioning will directly determine the printing quality. Since offset printing is a unique printing method for water, the fountain solution is first coated on the printing plate. Water means that the paper is stretched and deformed by water. The size of the paper used for the printing press of the eight-open offset press is small, and the degree of telescopic deformation is also correspondingly small, which is conducive to overprinting accuracy. Before the printing, the paper is subjected to hanging and conditioning treatment so that the temperature and humidity on the paper are relatively consistent with the temperature and humidity of the printing environment in the workshop. When the paper is required to be flat and the cutting size is the same, and the errors of the straight angle and the straightness are relatively small, the four-color overprinting in the printing can achieve high accuracy and good quality.
The difference between the six and eight open and offset offset presses:
There are two methods for feeding the offset press, horizontal feed and straight feed, and only the cross feed mode for the boot. Most non-offset presses use continuous feed, while the octal offset press generally uses overfeed. The input of the paper is based on the friction between the upper and lower rolls and the paper is handed to the part of the rule. Pull gauges, side gauges and front gauges. At the same time, the nip of the impression cylinder also plays an important role. The paper is positioned once at the front gauge and the secondary positioning is performed at the impression cylinder. Therefore, when printing, pay attention to the influence of the left and right position of the paper on overprinting.
Seven or eight open offset printing machine:
The wetting methods used in the eight-ply offset press are mainly water-weave-laying plate wetting devices, ink-and-dye Dagren wetting devices and Kunpak direct wetting devices. In the printing process, the amount of water should be controlled according to different dampening modes. No matter what kind of water supply method, we must accurately control the size of the printing plate surface water in order to achieve ink and water balance. If the water volume is too small, it is easy to dirty the plate, and if the amount of water is too large, the ink emulsification phenomenon such as blotting ink and print matt will occur. The small dot water is easy to be washed away, and at the same time, the water volume of the paper fiber is too large and the telescopic deformation will affect the accurate overprinting. Do not appear water and big ink phenomenon, the ideal wetting layout, the normal water supply effect should be: In the premise of not dirty version, use the least amount of water, in order to protect the printing quality.
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