Method of making pen body resin rods

Pencil comprising an integrally injection-moulded layered casing

Writing instrument or applicator having resin molded parts

Casing for a writing instrument and method of manufacturing the same using a dual injection molding

Method of moulding composite member, and composite member

Casing formed from thermoplastic resin and method for fabricating the casing

Casing for a writing instrument and method of manufacturing the same using dual injection molding

Airtight cap structure

Molding process for manufacturing a tubular molded article

Writing instrument and welding method of writing point assembly and writing instrument parts connecting structure and connecting method