The method to apply chaos mixing into micro liquid-liquid reactor, and more specifically, the way of stretching and folding of fluid elements without any rotors has been sought in the present study. The ferric nitrate solution is injected into the potassium thiocyanate solution bath from the bottom. Both solvents are mixtures of water and glycerin with high viscosity. The effect of the ratio of glycerin and water on the profile of interface between two solutions is tested as well as the difference of profile between continuous injection and intermittent injection. Injection of lower density solution intermittently into higher density solution in the bath shows a potential to be one of the ways to achieve the stretching and folding of fluid elements without any rotors.