Patent ID: 7520582

Claim:
An image forming apparatus, comprising: a first liquid ejection device which ejects droplets of a first liquid; a second liquid ejection device which ejects droplets of a second liquid; and a liquid volume ratio control device which controls a liquid volume ratio of the first liquid and the second liquid ejected from the first liquid ejection device and the second liquid ejection device, according to an image formed on a recording medium by the droplets of the first liquid and the second liquid on the recording medium, wherein: the image formed on the recording medium by depositing the droplets of the first liquid and the second liquid is a test pattern; and the image forming apparatus further comprises a test pattern droplet ejection control device which controls ejection of the droplets by the first liquid ejection device and the second liquid ejection device, in such a manner that the test pattern is printed, wherein the test pattern is an image which includes a plurality of evaluation patches in which a droplet ejection volume of at least one of the first liquid and the second liquid is varied.