JOURNAL OF COSMETIC SCIENCE 178 (18) N. S. Kim, J . H. Kim, and M. S. Han, The convergence of three-dimensional printing and nail-art technology, J. Cosmet. Med., 3, 94–101 (2019). (19) J. S. Eo, B. Cepeda, J. H. Kim, and N. S. Kim, A new paradigm of pharmaceutical drug delivery sys- tems (DDS): challenges for space, time, and shapes. Innovation Pharm., 9, 11–24 (2018). (20) N. S. Kim, B . Cepeda, J. H. Kim, G. Yue, S. Kim, and H. Kim, “IoT controlled screw-type 3D food printer using single line design technique,” in International Conference on Computational Science and Com- putational Intelligence (CSCI) (IEEE, Las Vegas, NV 2018), pp. 978–983. (21) A. K. Amert, D. H. Oh, and N. S. Kim, A simulation and experimental study on packing of nano-inks to attain better conductivity, J. Appl. Phys., 108, 102806 (2010). (22) C. Koopipat , N . Tsumura, Y. Miyake, and M. Fujino, Effect of ink spread and opitcal dot gain on the MTF of ink jet image. J. Imag. Sci. Technol., 46, 321–325 (2002). (23) M. Rebros, P. D F leming, and M. K. Joyce, UV-Inks, Substrates and Wetting, TAPPI Coating & Graphic Arts Conference (Atlanta, GA 2006). (24) K. Mendoza , A. Or t ega, and N. S. Kim, Optimization of UV LED-curable ink for reverse-offset roll- to-plate (RO-R2P) printing, J. Electron. Mater., 44, 784–791 (2015). (25) A. Ortega , B. Par k , and N. S. Kim, Printability and electrical conductivity of UV curable MWCNT ink, J. Electron. Mater., 44, 778–783 (2015). (26) N. S. Kim, J. S. E o , and D. Cho, Optimization of piston type extrusion (PTE) techniques for 3D printed food, J. Food Eng., 235, 41–49 (2018).

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