An exit device for latching a door in tornado-prone areas keeps the door closed when the door is subjected to tornado debris impact by incorporating a blocking arm that swings outward away from the door as impact energy is transferred through the door to the blocking arm in the exit device. The development device is provided with an extended circulation enclosure having a fill opening communicating with the two chambers. The ceramic matrix layer covers a substantial portion of at least one external side of the open metal structure. A substantially rigid enclosure for storing such serially joined sheet materials and incorporating an interference tab having one or more of such configurations may be dimensioned to dispense sheet materials from within an open-ended receptacle, for example a refuse container. Further, the electromagnetic radiation may be substantially free of ultraviolet radiation. A colorimetry value of a color patch output by the output device and represented in the device-independent color space is input, and a colorimetry value close to a conversion target value represented in the device-independent color space is extracted from the input colorimetry value.