To fabricate the stamps, a pre-designed mold was created with the desired square pillar pattern. The square pillars had dimensions of 150μm width, 150μm length and 1μm height, with 'L' shaped landmarks to pinpoint specific areas for bioink application. The design was first modelled in Fusion 360, whereby a silicon mold with the predetermined design was fabricated utilizing photolithography. Afterwards, uncured PDMS was mixed with a PDMS curing agent at a ratio of 10:1 for 20 minutes via stirring. The mixture was then placed under vacuum in a desiccator at -0.08 MPa pressure for 45mins to allow for degassing of the mixture. The degassed mixture was poured into the silicon mold and heated for 24-hours at 60 o C, or until the mixture solidified. The stamps were removed from the mold and cut to dimensions of 1.8mm width, 2mm length and 1mm height. To clean the mold of debris, the stamps were sonicated for 5mins. The stamps were regularly imaged under brightfield using the Nikon ECLIPSE Ti2 Series Inverted Microscope to track the quality of the stamps overtime, and 10 uses was determined as the threshold of when the stamps became 'aged' stamps.