abstract |
A filling liquid for an ink jet print head comprises an alkylene oxide additive of acetylene glycol, a humectant, and water, wherein the alkylene oxide additive has a HLB of 7 to 12 and is contained in the liquid by 0.05 to 0.5 mass%, and the humectant is contained in the liquid by 18 to 37 mass%, has a viscosity of 5 cps or less, and has a pH of 8 to 13. |