Abstract
The electrical conductivity of the black commercial ink was modified by introducing multi-walled carbon nanotubes (CNTs) in percentages of 0.5 to 1.5% by weight. The carboxylic groups, present on the surface of the CNTs, were sufficient for the dispersion of the nanostructures to be adequate in the ink. In addition, no incompatibility was distinguished between the CNTs and the ink components. In fact, a synergy between the black pigment and CNT could be observed. The application of the ink using the modified corrector pen made it possible to obtain uniform lines on ordinary paper based on cellulose fibres and on photographic paper. The patterns drawn by hand with the best conductivity were those made on ordinary paper and whose CNT content was equal to or greater than 1% by weight.