A light beam hardening apparatus is provided for hardening a material, such as dental material, exposed to light emitted by the light beam hardening apparatus. The fire barrier may generally include a first intumescent section, a first foam section coupled with the first intumescent section, and a second intumescent section coupled with the first foam section generally opposite the first intumescent section. The first terminal is grounded when the first wireless communication module is connected to the bus slot, and is kept in an open state when the second wireless communication module is connected to the bus slot. The tray includes a first and second side panel, a first and second bottom panel, a first and second divider panel, and a first and second end panel. A method for forming a tubular printing blanket includes placing a radiation-curable polymer over a base so as to form a layer of a printing blanket, and curing the radiation-curable polymer using a radiation source.