Patent ID: 7676179

Claim:
A wet image forming apparatus including a plurality of photoconductors and forming, by using liquid developers of a plurality of colors, images of the mutually different colors on the respective photoconductors, the wet image forming apparatus comprising: a plurality of collectors for collecting the liquid developers remaining on the respective photoconductors; a carrier liquid extracting device for extracting a carrier liquid from a liquid developer obtained by mixing together all the liquid developers collected by the plurality of collectors; and a carrier liquid purity detector for detecting purity of the carrier liquid extracted by the carrier liquid extracting device, wherein based on the purity detected by the carrier liquid purity detector, the carrier liquid extracted by the carrier liquid extracting device is recycled as a carrier liquid for concentration control of the liquid developers, or as a carrier liquid for cleaning of a member, the carrier liquid extracted by the carrier liquid extracting device being used for the cleaning of the member if the purity detected by the carrier liquid purity detector is equal to or larger than a predetermined value, and being used for the concentration control if the purity detected by the carrier liquid purity detector is less than the predetermined value.