a coated print bed for a 3d printer having a permanent print - surface coating permanently secured to a print bed substrate plate , having a smooth , planar surface that provides an adhesive interface layer between a first layer of an applied plastic print material and the coated print bed . the coating contains a matrix - forming compound , such as a solvent - or water - based epoxy resin , an adhesive material , and optionally a filler . the user can print a series of print object directly onto the permanent print surface coating of the coated print bed , without having to refresh or refurbish the print surface , such as by applying to the print bed surface a temporary coating such as painter &# 39 ; s tape , or a liquid adhesive .