A water solution of lead nitrate is infiltrated into a substrate made of a porous material, and liquid drops of a water solution of sodium sulfide, which is charged into a ink cartridge of a minute nozzle, are sprayed onto the substrate from the minute nozzle. Apparatus for re-orienting an image of a media item and a document processing module are also provided. The service provider has the option of arranging relevant billing requests in queues and queue groups, and allocating system resources for processing billing requests in order of priority. The software tool suite is adapted to create or modify a user profile for the user. In this way, separate processing electronics can process the signals obtained from the transducer to determine the desired position information.