Our project sought to use two semi-destructive techniques, cyclic and square wave voltammetry, to analyze and compare different pen inks. This process was supplemented with Thin Layer Chromatography, and applied to inks of varying color and brand. The electrochemical signals were analyzed from both the positive and negative sides, making sure to account for both reduction and oxidation effects. Three different electrolyte solutions were also used for comparison. Cyclic voltammetry, square wave voltammetry, and thin layer chromatography were found to be efficient and effective ways of differentiating and comparing pen inks.