Continuous inkjet printing method

A method of printing an image with a continuous inkjet printer system comprising:

• providing a jetting module including a nozzle in fluid communication with a liquid ink source;
• causing liquid ink to be jetted through the nozzle;
• causing liquid ink drops of at least two different sizes to be formed from the ink that is jetted through the nozzle;
• providing a catcher including a liquid drop contact face,
• using a deflection mechanism to deflect liquid ink drops of one size onto the liquid drop contact face of the catcher;
• and allowing liquid ink drops of another size to pass by the catcher and deposit onto a print media;
• and
• causing liquid drops that contact the liquid drop contact face to be recirculated to the liquid ink source;
• wherein the liquid ink is an aqueous inkjet ink comprising dispersed pigment colorant particles having a mean particle size of less than 150 nanometers and at least about 0.1 wt % of polymer additive distinct from any polymer dispersant used to disperse the pigment particles, and the liquid ink supplied to the nozzle from the liquid ink source is in-line filtered with a filter selected to be effective at retaining particles having particle sizes equal to and greater than 0.6 micrometers from the liquid ink and to pass the dispersed pigment particles.