Patent ID: 7527370

Claim:
An inkjet liquid treatment apparatus used in an inkjet recording apparatus which uses at least one first printing liquid including a polyvalent metal ion and at least one second printing liquid including an anionic compound which is capable of reacting with the metal ion to cause coagulation and thickening if mixed with the first printing liquid, wherein the inkjet recording apparatus comprises: a recording head comprising a plurality of nozzles which fire at least one liquid; and and a liquid treatment device having a liquid storage part that collects the printing liquids fired from the recording head during a non-printing period and stores the printing liquids, and further having a coagulation-thickening preventing agent solution feeding apparatus for adding a coagulation-thickening preventing agent; wherein a mixture including at least one of the first printing liquid(s) and at least one of the second printing liquid(s) fired from the recording head during the non-printing period is stored in the liquid storage part, and wherein the mixture stored in the liquid storage part includes a coagulation-thickening preventing agent which prevents the reaction of the metal ion with the anionic compound.