To illustrate the variations in the current response of the electrodes we performed cyclic voltammetry with electrodes from several batches in the redox probe FcDM. Current values of the working electrodes at the potential of 0.29V were plotted against their sizes. The 100µm wide electrodes had the most reproducible structures, these electrodes, therefore exhibited most uniform current ranges among the three sizes, within each plate. A lower reproducibility between different batches was observed for 100µm electrodes (Fig. ), which can be the result of a manual error occurred during the pasting of the Kapton tapes making length of the electrodes 10 to 15% shorter or longer. The smaller sizes, 50 and 25 µm, exhibited higher intraplate variability, this can be easily identified form the figure .