A method for making a forming structure having columnar protrusions extending therefrom comprising the steps of exposing a liquid photosensitive resin to light having an activating wavelength thereby inducing partial curing of the photosensitive resin to form a monolithic slab of partially-cured photosensitive...http://www.google.de/patents/US20050191496?utm_source=gb-gplus-sharePatent US20050191496 - Apparatus and method for making a forming structure
