Ruzhinji rwemapepa ekurongedza atinosangana nawo iindasitiri chena kadhibhodhi, inozivikanwawo seFBB(FOLDING BOX BOARD), imwe-layer kana akawanda-layer akasanganiswa bepa rakagadzirwa zvachose neakacheneswa kemikari pulp uye saizi yakazara.Yakakodzera kudhinda uye kurongedza zvigadzirwa zvine kutsetseka kwepamusoro, kuomarara, kutaridzika kwakachena, uye kuumbwa kwakanaka.Ivory board inoda kuchena kwakasimba.Kuchena kwegiredhi A kwakakura kudarika 92%, yegiredhi B inodarika 87%, uye yegiredhi C yakakura kudarika 82%.

FBB yakakamurwa kuita mhando dzakawanda nekuda kwezvigayo zvakasiyana zvemapepa uye kushandiswa kwakasiyana, uye bhodhi renzou pamitengo yakasiyana rinoenderana neyakasiyana zvigadzirwa zvekupedzisira.

Iyo inonyanya kurongedza pamusika inogadzirwa neindasitiri fbb.Pakati pavo, theNingbo Fold(FIV) yeApp paper mill ndiyo inonyanya kuzivikanwa, inoteverwa neIBS yeBohui paper mill uye GC1/GC2 yeChenming paper mill.