We report on a phenomenon of ring pattern formation of nanoparticles in small ink-jetted droplets (30-60 mu m diameter) of water-based suspensions on substrate, which occurs in several seconds, unlike 10 min and more in most previous works. The phenomenon may open the way for new applications connected with rapid creation of desired structures. In addition, we report here a method for the study of the relative motion of the solvent and pigments in suspension droplets by coloring the solvent with soluble dye and using spectral imaging techniques.