A magnetic tape cartridge reel includes a hub having a first end and a second end configured to receive a magnetic tape to be wound thereon and at least one flange which is attached to at least one of the first end and the second end of the hub, wherein the at least one flange is formed separately from the hub and is made of a flexible material. The concentrates employ three factors to achieve concentrated delivery of color to the processing machine and excellent and substantially uniform dispersion of color in the processing machine: melt flow of the concentrate exceeding at least 4 g10 min. When the frame is held in a metal mold and the stages are pressed, the interconnecting members are elastically deformed, so that the magnetic sensor chips are bonded onto the stages placed substantially in the same plane and are then wired with the leads. Certain other aspects of the mask relating to mask quality, such as line edge roughness and contact corner rounding, can also be quantified by using the simulated wafer image of the physical mask.