Roller lining and pressure adjustment

Print the tissue paper plate cylinder and rubber drum of center distance constant, just adjust the center of embossing roller and rubber roller, in 250-450 - g/m2 copy paper drum of center distance can be widened 0.20 0.4 mm, because the tissue paper surface smoothness is poorer, more rough, paper close degree is much less than the glossy paper also good, printed tissue paper also note when printing pressure also increase accordingly.

Such as tissue paper of 400 g/m2, the plate cylinder and rubber roller clearance is 3.95 mm, rubber roller and embossing roll gap is 3.40 mm, the total Bao Village for the plate cylinder is 0.65 0.75 mm, total rubber cylinder liner 3.15 3.35 mm (measured with micrometer), if the paper is from thick to thin, should be reduce the thickness ,  which is removed from the plate liner inside the bag to the rubber roller lining thickness, if at the time of printing paper from thin to thick, out of the rubber cylinder liner minus a certain thickness, and the corresponding added to the plate cylinder liner thickness.

Ii. Color sequence in printing

1, copy paper printing products have Hong Kong version of the field, and there are words, lines, patterns.Such as postal service express mail envelope, wine boxes, cigarette packaging (box), and other printing products, printing color sequence it is better to print text, line, pattern, and then put the full version of the field in the last computer printing, so that you can avoid because of the copy paper thicker, collide with each other to cause touch dirty mark when working paper brush bad, sticky dirty phenomenon on the back.

2. Put the dark color in the front and the light color in the back. Because the dark color ink has strong covering power and strong adhesion, put it in the front and print first, so as to facilitate accurate overprint;Light color ink cover power is weak, put in the back of the print run a little rule is not easy to observe, overprinter effect is much better.

3, often in a printing product, there are half-tone four-color electrical points, and there are continuous tone patterns, text, lines.Four - color electricity points should be printed first, conducive to the accuracy of overprinter, reduce the impact of paper expansion.Then printing continuous tone patterns, text, lines, in the arrangement of the printing color sequence to identify the primary and secondary, the first difficult after easy more appropriate.

Offsctdruckereien feeding paper adjustment

1, copy paper printing to feed the paper suction nozzle and blowing nozzle air volume should be increased accordingly.

2. The paper dividing nozzle and the paper feeding nozzle should be replaced with a larger diameter and thickness of the rubber gasket, and the tension gauge pressure spring can be replaced with steel wire with a diameter of 1.5mm;By removing the connecting pin between the feed roller CAM and its shaft, or remove the roller on the swing bar, in order to achieve the purpose of the feed roller not to swing, smooth paper.

3, when printing copy paper, offset printing press or the gap should be increased;The side gauge and the front gauge press the distance between the tongue and the board, the safety bar and the distance between the board to increase.

4, paper feeding pad and nano - imprint lithography drum surface and the distance between paper feeding pad and cardboard to increase some, and keep the distance is equal to the paper thickness plus 0.3mm