LIQUID TONNER CONCENTRATION MEASURING DEVICE AND METHOD

摘要

It is possible to provide a liquid tonner concentration measuring device and method which can accurately detect concentration of the liquid tonner. The device includes: a rotating roller (12); a tonner adhesion unit (12a) to which liquid tonner (T) arranged on the outer circumference of the roller (12) is adhered; a sensor (14) which detects concentration of the liquid tonner from a reflected light amount of the liquid tonner (T) adhered to the tonner adhesion unit (12a) with a predetermined thickness; and a scratch-off blade (15) which scratches off the liquid tonner from the tonner adhesion unit (12a) after detection by the sensor (14). When the liquid tonner is scratched off by the scratch-off blade, voltage is applied to the tonner adhesion unit (12a) with the same polarity as the liquid tonner.