The present invention relates to a molecular weight-enlarged, homogeneously soluble ligand, which includes:. The information processing apparatus includes a conversion information forming unit for creating object specifying information and object conversion information; a conversion information combining unit for creating combined print data; and a transmission unit for transmitting the combined print data to the image forming apparatus. A plurality of die caves is formed in the die cave material. The purge gas supply system includes a purge gas mixture generator configured to generate a purge gas mixture which includes at least one purging gas and moisture.