| 摘要 |
PROBLEM TO BE SOLVED: To efficiently set a toner charge amount.SOLUTION: When a toner charge amount in the toner in a liquid development agent that is transported to a development part is set, in a detection operation (ST4), detection means detects image concentration of a plurality of patch images formed with different developing biases in a state where the toner charge amount is set to be a constant value, and in a setting operation (ST12), control means calculates a current development characteristic on the basis of the image concentration of the plurality of patch images detected by the detection means, and if it is determined that the current development characteristic is not within a target setting range, the toner charge amount is set by controlling charging means so that the development characteristic is included in the target setting range. |
