Electrophotographic developer set including toner and powder adhesive, and method for producing bonded product

A method for producing a bonded product resulting from bonding at least one sheet of paper via an adhesive portion by using an electrophotographic developer set, wherein the electrophotographic developer set comprises

• a toner, and
• a powder adhesive,
• the toner comprises a thermoplastic resin A,
• the powder adhesive comprises a thermoplastic resin B and a wax A,
• the wax A has two or more ester groups in a molecule,
• the thermoplastic resin B has an ester group, and
• in a viscoelasticity measurement, with Gt′(100) (Pa) being a storage elastic modulus at 100° C. of the toner, and Gb′(100) (Pa) being a storage elastic modulus at 100° C. of the powder adhesive,
• Gb′(100) is 1.00×105 Pa or less, and
• Gt′(100)/Gb′(100) is 1.20 or more, wherein
• the bonded product has
• a surface A on which an adhesive portion of the powder adhesive is fixed, and a surface B on which a toner image portion of the toner is fixed, the surface B being a surface different from the surface A, wherein
• the method comprises the following steps, in no particular order:
• forming the toner image portion on the surface B, and fixing the toner image portion on the surface B by heating;
• and
• forming the adhesive portion on the surface A, and fixing the adhesive portion on the surface A by heating, and wherein
• the method further comprises the following steps, after formation and fixation of the toner image portion and the adhesive portion,
• overlaying the paper so as to interpose the adhesive portion, and
• melting the adhesive portion thereby bonding the paper to obtain the bonded product.