A crate or container, such as for transporting egg cartons or other items includes a base, opposed side walls and a rear wall extending upward from the base. A process for fabrication of masters takes advantage of the circular symmetry of magnetic disks and reduces the total required mastering time by an order of magnitude over prior art processes. The roughness is advantageously retained at locations on a turbine blade or vane which are at risk of detachment, while the roughness of the remaining surface is reduced in order to reduce the heat transfer to the surrounding hot-gas flow. It is determined whether the interrupt is indicates peripheral class compliance.