A honeycomb body for an exhaust treatment unit has at least one honeycomb structure and a least one housing, which at least partially surrounds the at least one honeycomb structure. In an injection step, the first and second components are injected into the mold cavity via nozzle means having a first orifice through which the first component is injected. Detected deadlocks are then avoided by re-allocation of channel resources. The reaction conditions of each reaction compartment for treating a slide can preferably be controlled independently, including the individualized application of reagents to each slide and the individualized treatment of each slide.