Color offset printing complete operation manual (2)

First of all, to give the ink on the offset press, the specific steps are as follows:
1 Turn on the power of the offset press, press the “Speed ​​Control” button, press the “+” button, adjust the printing speed to 5-6 steps, then apply the ink evenly on the ink roller. Press the "Start/Stop" button to start the machine, and then press the "+" again. This will cause both the water roller and the ink roller to ink. (If the printing plate has a large area in the field or when the number of printing is large, do not apply ink directly to the ink fountain roller. Instead, apply the ink to the ink fountain so that the offset machine automatically inks the ink. The ink is uniform.)

2 After turning on the machine for one minute, let the water roller and ink roller make ink evenly. Press the “Start/Stop” button again to stop. Put the water tray on the back of the machine and inject proper amount of water into the water tray. The height of the water will not overflow. Water tray prevails.

4, hanging PS version

The well-printed PS plate is taken out of the clean water and hung on the plate slide block of the roller on the offset printing machine. Note that before hanging the PS plate, the two hanging Plates on the roller should be pushed into the middle of the roller and aligned. This will ensure that the PS version is upheld. It is also important to note that if the business card has a large area of ​​color blocks, the business card paper will not be stuck on the blanket when the business card is printed. Touch with the paper (turn the PS plate upside down) so that the business card paper and blanket separation will be smooth. When performing full-page printing or printing a synthetic card (removable) business card paper, it is best to use some spray (anti-blocking agent) to prevent blocking.

5, adjust the printing position

After the 1PS version was hung up, more than a dozen waste business card papers (commonly known as over-wheel paper) were placed in the paper rack to adjust the position of the business card.

2 Press the "Start" button to move the clutch to the "Closed" position. Turn the machine up and press the "Control" button. Then press and hold the "+" button to adjust the amount of water to 18-20. After the ink is evenly applied and not dirty, press the "Print" button again to print the text on the PS plate onto the blanket.

3 Press the "Print" button. When the paper pusher automatically pushes the business card paper into the machine, press the "Print" button again, and the machine will automatically stop after a business card. Take out the first printed business card. At this time, the general location of the business card paper will be inaccurate. You need to adjust the business card by using the adjustment screw on the middle roller and the left and right stoppers on the paper board and the hanging block slider on the upper roller. The position is generally adjusted several times until the position printed on the paper is correct.

4 Replace with clean business card paper, adjust the printing speed, press the "print" button, so that the exquisite business card will be printed out.

6, keep a good printing effect

The characteristics of the PS version are: Water repellency is strong where there are characters, and hydrophilicity is strong where no words are left blank. When printed in this way, the PS plate has a place where the characters are sticky, and where there is no character space, the ink is not sticky. Then the ink is printed on the blanket through the PS plate, and then transferred onto the name plate paper through the blanket. Therefore, it is very important to maintain the balance of water and ink during the printing process, and it is also the key to printing a good business card.

There are a total of 50 gears for water control in the South Color Printing King Card Machine. Usually in the spring and autumn season, at normal room temperature, the amount of water is generally controlled between 10-20; in summer, the temperature is high, the water is easy to evaporate, and the amount of water is usually above 20; in winter, the temperature is low, the ink is dry, and the amount of water is smaller. In the printing process, if the amount of water is too large, the ink will appear light, the text will appear imaginary, and a horizontal water mark will appear when printed with a large area of ​​color. If the amount of water is too small, the blank area on the layout will be easily inked and dirty. Version. Therefore, it is best to adjust the balance of water and ink before printing so that the printed business cards can achieve the best results. Here's how to adjust the amount of water in different situations:

1. When the temperature is high, the water evaporates quickly and the amount of water should be increased.

2, when the ink is dry, less water; when the ink is thin, more water.

3. When the printing speed is fast, the water roller has a large amount of water, and the amount of water needed to be reduced.

4, in the printing process, in the premise of keeping the business card is not dirty version, try to reduce the amount of water, the printed text will be more clear.

7, cleaning machine:

When the business card is printed or a color is printed, the offset printing machine needs to be thoroughly cleaned. Wash the machine with petrol or a special cleaning solution, use about 15 ml, 1-2 minutes to clean. Then wipe the blanket and upper and lower rollers with a small amount of benzine or a cleaning solution with a rag to print the next or next color.