A conductive pattern forming ink for forming a conductive pattern on a substrate by a droplet discharge method includes: metal particles; an aqueous dispersion medium in which the metal particles are dispersed; inositol; and a polyglycerol compound having a polyglycerol skeleton. There are provided at least one pair of locking portions, which are adapted to be engaged with each other in areas near corners of both side faces of the opening of the containing part and an opening of the lid part. Some of the sounds presented in the series are labeled as validation sounds. A flume is defined between a top end of the lighting portion and the lid. Prior to introducing the liquid into the MOF, occluded reaction solvent, such as DEF or DMF, in the MOF can be exchanged for the miscible solvent. The header includes a first work surface deployed when the header is in a first position and a second work surface deployed when the header is in a second position.