Millimask: Millimask high definition photoplates are a silver halide photoplate medium for use in photomask making as well as holographic imaging processes. This extremely high resolution plate is also ideally suited for R&D programs for recordation of micro-radiography in dentistry, radiological studies and image recording. In the Microelectronics Industry it is the most desired of all silver halide type materials for photomask making today. The Millimask plate is capable of resolving one micron lines and spaces when exposed properly with fine line defintion. It achieves an optical density of 3.0 or greater even though the total thickness of this film is only 2-3 microns thick. Its flat black finish gives it a low anti-reflection characteristic. This photoplate is available in many sizes and various glass thicknesses.