Gravure Printing

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Problem

Unexpected fires can be a serious hazard in gravure printing. They are caused by static electricity on the web discharging (as a spark) to surrounding grounded parts in the presence of combustible solvents from the ink tray. This typically happens as the web arrives at the print nip and on exit from it. This problem is particularly common when the ink is either gold, silver or black, as these inks tend to be somewhat conductive. Thus conductivity allows the spark to propagate more easily. Typical installation of short range ionising bars is better than nothing but has several disadvantages due to their short range:

• Cannot address the real problem areas
• Becomes quickly contaminated
• Short dwell time thus sub-optimal neutralisation
• Can be damaged easily by a web break

Solution

The installation of a Meech 915EX bar, which has an effective range of up to 150mm will solve all these problems by eliminating the static charge precisely where it is needed. It’s extended range also allows it to be installed away from the web reducing contamination and damage issues.