Face Shield with Sealed Top (Foam Tape + 3-hole punch)

This is a 3DPrintable Face Shield, click here for a (CNC Friendly Face Shield)[https://www.thingiverse.com/thing:4262028] #Edits# * 4/4/2020: Uploaded v19, which reduces the print time by 50% from v12. * 3/30/2020: Uploaded v12, which replaces the holes on the visor with pegs and eliminates the need for zip ties. #Objective# Medical professionals anticipate a shortage of PPE during the COVID-19 pandemic and consider that a suitable Face Shield may be produced by makers as long as: * The face shield provides a tight seal around the forehead to prevent contamination * The shield has a considerable (>1.25") separation from the face for ventilation * The headband be soft and wide for comfort during long procedures * The shield be as transparent as possible Beyond that, we need to be able to make it: * Inexpensive * Manufacturable at scale by makers, and * Easy to assemble by doctors or hospital staff. Here, we try to share the best compromise we could find based o