The experiments were performed by dispensing a fluid from a 19G flat-headed needle (connected to a 10 mL syringe) onto a 4 mm diameter cylindrical glass substrate. The fluid was dispensed using an Alaris Carefusion syringe pump at a flow rate of 0.2 mL/hr but dispensing was stopped immediately prior to droplet contact. The thinning process was recorded on an iPhone 8 with a clip-on macrolense using either the Slo-Mo (240 frames per second (fps)) or video (30 fps) settings. Video recordings were converted from .mov files on the iPhone by default to individual frame-by-frame .tiff files. Then MatLab was used to analyse the thinning process. The conversion process require different software for each step as follows.