Mkpuchi dabeere na mmiri b? a viscous mmiri mmiri na resin, ma ? b? mman?, ma ? b? emulsion d? ka onye isi, na organic mgbaze ma ? b? mmiri. Ihe mkpuchi nke mmiri na-ar? ?r? nke ?ma na-ar?kwa ?r? nke ?ma, ike nzuzo d? mma, adhesion siri ike, njide mmiri d? mma na njirimara nd? ?z?; Cellulose b? ak?r?ngwa kachas? mma iji nye ihe nd? a.