A non-Newtonian photo-curable ink composition that includes a polymerizable FMOC material in an amount ranging from about 2 wt % to about 20 wt % by total weight of the ink composition, a photo-initiator, an organic solvent and water, wherein the ink composition hasa first dynamic viscosity ranging from 25 cps to 10,000 cps at a first state and a second dynamic viscosity ranging from 1 cps to 50 cps at a second state. Also described herein is a method for making such non-Newtonian photo-curable ink composition and a method for producing printed images using such non-Newtonian photo-curable ink composition.