Paper based microfluidics has been a hot topic in the last several years due to its low cost, easy to use and its emerging role as the new point-of-care diagnostics tool for developing countries.
This paper describes the exact procedure for making such a device:
Title: Diagnostics for the Developing World: Microfluidic Paper-Based Analytical Devices
Andres W. Martinez, Scott T. Phillips and George M. Whitesides
Universidade de São Paulo (Brazil)/Harvard University
Anal. Chem., 2010, 82 (1), pp 3–10