Ink Flow on Rotating Rollers.

Ink flow as it relates to distribution of ink on a press, transfer to paper, and trapping over wet ink in analyzed. Although viscosity and yield value are of primary importance, their determination by low speed, constant pressure instruments is believed inadequate. Finely dispersed air in the ink film and unrelaxed elastic forces in the ink in the nip are proposed as explanation of the difference between press results and viscosity measurements. The advantages and disadvantages of the Inkometer are discussed in light of the above.