A phase-change recording material on which high speed recordingerasing is possible, which has excellent recording characteristics, which has a high storage stability of recording signals and which is excellent in the repeated recording durability, and an information recording medium using the above material are provided. The server apparatus automatically selects suitable performance information from its own database, and delivers the thus-selected performance information to each of the client apparatus currently connected to the server apparatus. The conveyor hub also carries a blade in the region of the nozzles and intermediate adjacent flights of the conveyor for directing fluid droplets from the nozzles over said solids.