Fast prototyping of paper-based microfluidic devices by contact stamping using indelible ink Curto, Vicenzo López Ruiz, Nuria Capitán Vallvey, Luis Fermín Palma López, Alberto José Benito-Lopez, Fernando Diamond, Dermot This work was supported by Science Foundation Ireland under CLARITY CSET award (grant 07/CE/I1147). Thanks to Staedtler Mars GmbH & Co. KG for providing the LumocolorE Permanent Universal Black Ink Here we present a fast and cheap prototyping technique for the realisation of paper-based microfluidic devices simply by using a stamp and indelible ink. The proposed mechanism involves contact stamping of indelible ink to laboratory filter paper using a PDMS stamp, which defines the microfluidic structure. It is a cleanroom and washing steps-free method which provides a reproducible method for the production of functional paper-based microfluidic devices in a single step in less than 10 s. The method is fully characterised and the concept has been applied, as a proof-of-principle, for the realisation of a low-cost colorimetric glucose sensor. 2022-03-11T12:59:48Z 2022-03-11T12:59:48Z 2013 info:eu-repo/semantics/article RSC Adv., 2013,3, 18811-18816 http://hdl.handle.net/10481/73336 10.1039/c3ra43825b eng info:eu-repo/semantics/openAccess RSC Publishing