Ethylene glycol and isopropanol are mixed solvents, in which isopropanol is also used as moisturizer to control the evaporation rate of the solvent and keep the nozzle wet, so as to prevent nozzle blockage.
And isopropyl alcohol is a mixed solvent, wherein isopropyl alcohol is also used as a humectant to control the evaporation rate of the solvent and keep the nozzle moist, thereby preventing the nozzle from being blocked.