Simulation the axial oil distribution of offset printing

Abstract

Taking the inking system of ROLAND 700 Sheetfed Offset for example, by the way of computer simulation, this paper analysis the distribution of ink film thicknesses which come from Ink fountain of different image coverage zone and transfer to the substrates by inking system, puts forward that the ink of high image coverage zone will flow to the adjacent low image coverage zone because of vibrator oscillation, it lead to lack of ink in high image coverage zone and too much ink in low image coverage zone. The change of ink thickness on paper from high image coverage to low image coverage zone is continuous but non-monotonic, so the output ink on the ink fountain roller need to be compensated.