Macam-macam lipatan surat
ü Lipatan Tunggal (Single fold)
ü Lipatan Ganda Sejajar (Parallel double fold)
ü Lipatan Model Baron (Baronial)
ü Lipatan Baku Rendah (Low standard fold)
ü Lipatan Akordion Rendah (Low accordion fold)
ü Lipatan Model Perancis (French fold)
