Photomask patterns are represented using contours defined by level-set functions. The metal surface of one or more fluidized bed reactor components is at least partially coated with a hard protective layer comprising a material having an ultimate tensile strength of at least 700 MPa at 650\xb0 C. Terms and conditions that can be accepted by the user are then made available to the user in the form of a model digital license agreement. Methods of making and electrographically printing liquid toners derived from these organosols are also described. Further, such a superhard bearing element may comprise a chamfer formed about at least a portion of a periphery of the arcuate bearing surface.