INKJET INK SET FOR PRINTING ON OFFSET MEDIA
The present disclosure provides an ink set containing aqueous inkjet inks. The ink set is particular suitable for printing on offset media.
1 . An inkjet ink set for printing on offset media, said ink set comprising a magenta, a yellow, a cyan, and a black ink, wherein each of the inks in said ink set is independently comprised of a colorant, an aqueous vehicle, a polymeric binder, a nonionic surfactant, and optionally an 1,2-alkanediol, wherein said polymeric binder is dispersed in said aqueous vehicle, and wherein said inkjet ink is printed directly onto said offset media without any pretreatment/precoating of said offset media.
2 . The ink set of claim 1 , wherein said ink set is used for fixed array printing.
3 . The ink set of claim 1 , wherein said ink set has a discharge from printhead frequency of 20 kHz or greater.
4 . The ink set of claim 1 , wherein each of the ink has a surface tension of between 18 and 35.
5 . The ink set of claim 1 , wherein one or more of said colorant is a self-dispersing pigment.
6 . The ink set of claim 1 , wherein one or more of said colorant s dispersed by a polymeric dispersant.
7 . The ink set of claim 1 , wherein said non-ionic surfactant is a fluorosurfactant.
8 . The ink set of claim 1 , wherein said non-ionic surfactant is a non-fluorosurfactant.
9 . The ink set of claim 8 , wherein said non-fluorosurfactant has a HLB value of less than 5.