A method of forming a micro edge of a flexible, elastomeric element comprises the following steps: - forming a mold cavity with a first mold plate and a second mold plate positioned adjacent to the first mold plate - forming a mold corner of the mold cavity using an intersection of the first mold plate and second mold plate - injecting an elastomer into the mold cavity and - allowing gas contained within the mold cavity to out-gas through the intersection between the first and second mold plates to form a micro edge along the mold corner formed by the intersection.
