Ukudweba (i-black coating)
Indwangu ehwabhayo yokuhlanza ipayipi lensimbi ukuze kukhishwe ukugqwala, xubha into evimbela ukugqwala ukuze ulinde upende ukuthi wome ngokwemvelo, ukuxubha ijazi lokuqala elilwa nokugqwala, ngemva kokoma kwemvelo, ukuxubha futhi ijazi elivimbela ukugqwala.