Method for forming printed material and system for forming printed material

A system for forming a printed material, the system comprising:

• an image forming unit that forms an image on a recording medium;
• a particle applying unit that applies particles to the recording medium having the image formed thereon;
• a particle heating unit that heats the particles applied to the recording medium;
• and
• a multilayer body pressurizing unit that pressurizes, in a thickness direction, a multilayer body obtained by folding the recording medium so that the heated particles are sandwiched between flaps of the recording medium or a multilayer body obtained by placing another recording medium on top of the recording medium with the heated particles therebetween,
• wherein the particles contain a styrene resin and a (meth)acrylic acid ester resin,
• the (meth)acrylic acid ester resin contains two (meth)acrylic acid ester monomer units, and a mass ratio of the (meth)acrylic acid ester monomer units relative to a total of polymerization components is 90 mass % or more,
• the particles have two glass transition temperatures, and a difference between the lowest glass transition temperature and the highest glass transition temperature is 30° C. or more, and
• the particles have a sea phase containing the styrene resin and island phases containing the (meth)acrylic acid ester resin and being dispersed in the sea phases.