Patent ID: 8851595

Claim:
A liquid discharger comprising: a liquid cartridge comprising: a first liquid tank configured to store first liquid for forming an image on a sheet; and a second liquid tank configured to store second liquid that acts on the first liquid; an attachment unit configured such that the liquid cartridge is attached thereto; a first liquid discharge head configured to discharge, onto the sheet, the first liquid supplied from the first liquid tank; a second liquid discharge head configured to discharge, onto the sheet, the second liquid supplied from the second liquid tank; a storage unit configured to store image data of the image to be formed on the sheet; a first liquid discharge controller configured to control the first liquid discharge head to discharge the first liquid onto image formation areas on the sheet where the image is formed, based on the image data stored in the storage unit; a second liquid discharge controller configured to control the second liquid discharge head to discharge the second liquid onto at least a part of the image formation areas, based on the image data stored in the storage unit; a first liquid remaining amount detector configured to detect a remaining amount of the first liquid stored in the first liquid tank; a second liquid remaining amount detector configured to detect a remaining amount of the second liquid stored in the second liquid tank; and a condition determining unit configured to, based on the remaining amount of the first liquid detected by the first liquid remaining amount detector and the remaining amount of the second liquid detected by the second liquid remaining amount detector, determine whether a predetermined condition is satisfied under a situation where the remaining amount of the second liquid is less than the remaining amount of the first liquid, wherein when the condition determining unit determines that the predetermined condition is satisfied, the second liquid discharge controller controls the second liquid discharge head to discharge onto the image formation areas the second liquid of an amount smaller than an amount of the second liquid to be discharged onto the image formation areas in a case where the condition determining unit determines that the predetermined condition is not satisfied, wherein the predetermined condition comprises a condition that a division value obtained by dividing the remaining amount of the first liquid detected by the first liquid remaining amount detector by the remaining amount of the second liquid detected by the second liquid remaining amount detector is more than a first threshold.