Utilization of a printing ink in a printing group and printing group of a rotary printing press
The tack of an ink that is used in a printing group of a rotating printing press, or the temperature of a rotating component in the printing group is selected or controlled. This selection or control is accomplished in a manner so that optimal printing is achieved.
1. A method of using ink in a rotary printing press including:
providing a dry offset printing group in said rotary printing press;
supplying ink to said printing group;
transferring said ink to a newsprint paper to be printed in said printing group, said newsprint paper having a coating weight of not more than 20 g/m 2 ;
operating said printing group in a temperature range of between 15° C. and 40° C.; and
providing said ink with a tackiness having a maximum tack of 12, as determined by an INKOMAT tackometer in said temperature range and having a characteristic of a gradient of no more than 0.6 tack/°C. in said temperature range.
2. The method of claim 1 wherein said temperature range is 22 to 50° C.
3. The method of claim 1 further including providing said ink having a tackiness of 6 to 9.5 tack.
4. The method of claim 1 further including providing a waterless planographic printing forme in said printing group.
5. The method of claim 1 further including holding said tackiness constant in one production range of said printing group.
6. The method of claim 5 further including providing said production range as being between 9 to 14 m/s.
7. The method of claim 5 further including providing said production range as being between 3 to 16 m/s.
8. The method of claim 1 further including providing said gradient at a production speed of 9 to 14 m/s and a temperature of 22° to 40° C.
9. The method of claim 1 further including providing said printing ink having said tackiness and providing a roll-off speed in a range of 3 to 16 m/s.
10. The method of claim 1 further including determining said characteristic at a measured temperature of 30° C.
11. The method of claim 1 further including providing said ink with said characteristic at a roll-off speed of at least 6 m/s.
12. The method of claim 1 further including providing said characteristic at a production speed of between 9 to 14 m/s and a temperature between 22° and 40° C.
13. A method of using ink in a rotary printing press including:
providing a dry offset printing group in said rotary printing press;
supplying ink to said printing group;
transferring said ink to a newsprint paper to be printed in said printing group, said newsprint paper having a coating weight of not more than 20 g/m 2 ;
operating said printing group in a production speed range of between 1 and 16 m/s; and
providing said ink with a tackiness having a maximum tack of 12, as determined by an INKOMAT tackometer in said production speed range and having a characteristic of a gradient of no more than 1.5 tack*m/s in said production speed range.
14. The method of claim 13 further including providing said ink having a tackiness of 6 to 9.5 tack.
15. The method of claim 13 further including providing a waterless planographic printing forme in said printing group.
16. The method of claim 13 further including holding said tackiness constant in one production range of said printing group.
17. The method of claim 16 further including providing said production range as being between 9 to 14 m/s.
18. The method of claim 16 further including providing said production range as being between 3 to 16 m/s.
19. The method of claim 13 further including providing said gradient at a production speed of 9 to 14 m/s and a temperature of 22° to 50° C.
20. The method of claim 13 further including providing said printing ink having said tack and providing a roll-off speed in a range of 3 to 16 m/s.
21. The method of claim 13 further including determining said characteristic at a measured temperature of 30° C.
22. The method of claim 13 further including providing said ink with said characteristic at a roll-off speed of at least 6 m/s.
23. The method of claim 13 further including providing said characteristic at a production speed of between 9 to 14 m/s and a temperature between 22° and 50° C.