Patent ID: 8376541

Claim:
A method of ejecting ink from a thermal inkjet printhead, said method comprising the steps of: (i) supplying an ink to at least one nozzle chamber of said printhead; and (ii) actuating a heater element in said nozzle chamber and heating said ink to a temperature sufficient to form a bubble therein, thereby causing said ink to be ejected from a nozzle opening associated with said nozzle chamber, wherein said ink is a solvent-based ink composition consists only of: (a) 20-80 wt. % of a compound of formula (A); wherein: R 1 is C 1-6 alkyl; and each of R 2 , R 3 and R 4 is independently selected from H, C 1-6 alkyl, halogen, OH, and C 1-6 alkoxy; (b) 10-70 wt. % of a C 1-6 alcohol; (c) 0.01-25 wt. % of a colorant; and (d) 0.01-10 wt. % of a surfactant.