Image formation with a concentrated ink mixture

A device comprising:

• a mixer to receive a non-paste ink mixture of ink particles suspended within a first oil-based liquid carrier in a first concentration and to dilute the non-paste ink mixture with a second oil-based liquid carrier to lower the first concentration of the non-paste ink mixture to a second concentration which is at least 50 percent less concentrated than the first concentration;
• a fluid ejection device to deposit droplets of the diluted non-paste ink mixture onto a substrate;
• a charge source to emit airborne charges to induce the ink particles, via electrostatic attraction relative to the substrate, to move through the respective liquid carriers of the diluted ink mixture to become electrostatically fixed relative to the substrate;
• and
• a liquid removal element to remove at least a portion of the respective liquid carriers from the substrate;
• and
• a fluid pathway to fluidly communicate the removed respective liquid carriers from the liquid removal element to the mixer to provide at least a portion of the second liquid carrier at the mixer.

A method comprising:

• forming a second liquid ink mixture having a second concentration via adding a second non-aqueous liquid carrier to a first liquid ink mixture having a first concentration of ink particles within a first non-aqueous liquid carrier, the first concentration being substantially greater than the second concentration;
• depositing droplets of the second liquid ink mixture onto a substrate and electrostatically fixing the ink particles relative to the substrate;
• removing, after the electrostatic fixation, at least a portion of the respective liquid carriers of the second liquid ink mixture from the substrate;
• and
• directing the removed portion of the respective liquid carriers to provide at least a portion of the second non-aqueous liquid carrier to be added to the first liquid ink mixture.