Security printing is an emerging field to prevent forgery, tampering, and counterfeiting of a wide variety of documents and consumer goods. In this work, mechanochromic ink for security printing is suggested as a viable option for a reversible, easily detectable way of determining the legitimacy of a document or product. Generally, mechanochromic polymers change color and exhibit fluorescence in response to a mechanical force due to the presence of mechanophore molecules covalently linked within the polymer structure. A well-known mechanophore, spiropyran (SP), is easily incorporated into poly(dimethylsiloxane) (PDMS), an elastomeric polymer. In this study, SP-PDMS ink for security printing applications is studied by tuning the initial viscosity with a solvent. Additionally, the printed film quality is determined through both optical and mechanical techniques. Printing conditions were determined for printing with a Nordson Engineered Fluid Dispensing (EFD) Printer. The responsiveness of the mechanochromic ink to mechanical loading is explored through visible color change.