Patent ID: 7794033

Claim:
A printing system for triggering the print head of a conventional printer cartridge ( 5 ) which is intended per se for water-based printing ink and include a print head that has ink ejector elements arranged in a matrix, and wherein a particular heating element to be actuated of an ink ejector element is activated by means of an address signal (AS) functioning as a line signal and by means of a master signal (SS) functioning as a column signal, comprising: signal regulator means for regulating the master signal (SS) and the address signal (AS); regulating means for operating on address pulses of the address signal (AS) to generate an address signal (AS 1 ); and regulating means for operating on master pulses of the master signal (SS) to generate a master signal (SS 2 ); characterized in that the master pulses of the master signal (SS 2 ) have a lesser signal amplitude than the address pulses of the address signal (AS 1 ) and that the printing ink in the printer cartridge ( 5 ) has a volumetric proportion of alcohol of over 70%.