This is an example of what can be done with a converted RepRap wax 3-D printer https://www.youmagine.com/designs/conversion-of-prusa-to-wax-3-d-printer For more information see: For Free Access to Academic Paper "Open-source Wax RepRap 3-D Printer for Rapid Prototyping Paper-Based Microfluidics," see https://www.academia.edu/27039833/Open-source_Wax_RepRap_3-D_Printer_for_Rapid_Prototyping_Paper-Based_Microfluidics Full BOM and instructions here: http://www.appropedia.org/Open-source_Wax_RepRap_3-D_Printer_for_Rapid_Prototyping_Paper-Based_Microfluidics