Laboratory of technology based on flow, commas. (Microfluidics), which is a technology that manages the flow of traffic is less, or at least one side of the channel, there is a large flow of transport between 1-100 micrometre is generally the thickness of the paper itself is already micrometre. The paper is a material like water (hydrophilic) to drip onto paper or dipping the paper into the water. Water is absorbed throughout the paper to create a transport channel that controls the direction. Permeation of water or fluid, which dissolved substances want to analyze to the test area on the paper. Laboratory on paper is to make the bangboriwen on paper do not like water (hydrophobic) at present, there are at least 4 articles articles [3-6] which reviews how to build lab on a sheet of paper, which contained about ten ways such as printing with light (photolithography) [7] to print with a plotter (plotter) [8] the carving with the injection of the ink (ink-Jet etching) [9] to print with ink injection (ink-jet printing) [10] to adjust the condition by plasma (plasma treatment) [10] to print with wax (wax printing) [11] flexible printing (flexography printing) [12] and adjust its laser (laser treatment) [13] and cutting (cutting paper) [14] etc., which in many ways this may require personnel who specialize in the use of chemicals or equipment that is expensive or rare in developing countries.
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