Contact-anglein more detail in other works [24,2,3]. The nanoparticles tend to move towards the edge of the printed line, due to the increase in temperature and evaporation rate of the ink solvents. One consequence of that behaviour is that the line shows conductivity only at the edges. This effect is clearly visible when using thermal sintering, at lower temperatures, such as 130–150 °C, temperature recommended by ink manufacturers. If a photonic sintering technique is used, such as IR, this effect is drastically reduced. The localized energy of the photonic irradiation on the metallic nanoparticles, increases dramatically the individual nanoparticle energy, the thermal energy, inducing a faster evaporation rate of the solvent and the coalescence of the adjacent nanoparticles, not giving time for any metallic nanoparticles movement.