// The right step for a stable printing process
(1) Viscosity measuring
With the right viscosity the converting of the inks are improved. Printing of inks with a higher viscosity
leads to a higher ink consumption. Means ink is wasted (up to 15% p.a.) and the colour density is influenced.
for inks: 22-23 sec. Ford cup 4 | for water based varnishes: 20-21 sec. Ford cup 4
The adhesion of the ink onto the sheet will be improved with the correct pH-value. In addition the drying
results will be improved, too. Basically, the pH-value should decline from printing unit 1 to the last prin-
ting unit. The pH-value of the first printing unit should be 9-9,5 and should be dropped by 0,2 per each
further printing unit. However, it should never be lower than 8.
The ink temperature is influenced by the ambient temperature and the friction of the ink in the printing
machine. With a fix temperature the change of viscosity and pH can be controlled and kept on a stable
value. The temperature should be set between 20 and 22 °C.
(4) Automatic viscosity adjustment (pH control)
Automatic adding of amines (or water) in small portions.
The adding of amines automatically controls your pH.