Iyunithi yokuqala iyafana neyesibini. Ukuba wongeza amanzi, iyunithi ingasetyenziselwa ukususa umgubo wokuprinta. Iyunithi yesibini yidizayini yeerola ezintathu, apho irola yerabha isebenzisa izinto ezithile ukuze ikwazi ukugquma imveliso ngokulinganayo ngesiphumo esihle. Kwaye ifanele ioyile esekwe emanzini/esekwe kwioyile kunye ne-blister varnish, njl. Le yunithi ingalungiswa ngokulula kwicala elinye.