A black ink-jet printing ink comprising: a) from 9 to 11.5 parts of C.I. Reactive Black 39; b) from 5 to 7.5 parts of C.I. Reactive Brown 11 and/or C.I. Reactive Yellow 95; c) from 2.5 to 4 parts of C.I. Reactive Orange 12 and/or C.I. Reactive Orange 13; d) from 0.1 to 10 parts of a buffer; e) from 15 to 30 parts of ethylene glycol; f) from 0 to 10 parts of a water miscible solvent; g) from 0.01 to 2.5 parts of a non-ionic surfactant; h) from 4 to 14 parts of urea; i) from 0 to 5 parts of biocide; and j) the balance to 100 parts water. Also an ink-jet printing process, a multicolour ink-set and printed substrates.