An ink-jet printing process for printing textile fibre materials, wherein the fiber materials are printed with an aqueous ink comprising (I) at least one fiber reactive dye, and (II) a di, tri or tetramer of a C.sub.2-C.sub.4oxyalkylene or a mono- or di-C.sub.1-C.sub.4-alkyl ether of a di, tri or tetramer of a C.sub.2-C.sub.4-oxyalkylene, said ink having a viscosity from 5 to 20 mPas at 25.degree. C., and wherein the said ink is applied to the fiber material with an ink-jet print head comprising an ink supply layer (b) receiving ink from an external ink reservoir, said ink supply layer having a first side and a second side and comprising, a porous medium having a plurality of pores therein and a plurality of holes extending therethrough, so as to allow passage of the ink allows for high speed printing and yields prints with good fastness properties.