A wet rub resistant ink composition comprises, by weight, at least about 15% carrier medium, colorant in an amount of no more than about 20%, and at least about 2% polymeric capsules having central cavities containing water. The composition is substantially free of film-forming resins. The ink composition...http://www.google.de/patents/US6309452?utm_source=gb-gplus-sharePatent US6309452 - Wet rub resistant ink compositions
