Patent ID: 8530400

Claim:
A maintenance liquid for inkjet printers, which comprises at least one of glycol ethers and glycol esters represented by the following general formulas (1) to (3), and 45 to 10 mg/L of dissolved oxygen: R 1 CO(OR 2 ) x OR 3 General formula (1) R 4 CO(OR 5 ) y OCOR 6 General formula (2) R 7 (OR 8 ) z OR 9 General formula (3) wherein R 2 , R 5 , and R 8 each independently represent an ethylene group or a propylene group, R 1 , R 3 , R 4 , and R 6 each independently represent an alkyl group having 1 to 4 carbon atoms, R 7 and R 9 each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and X, 1, and Z each independently represent an integer of 1 to 4, wherein said maintenance liquid does not contain water.