N'ime ọtụtụ afọ, anyị enyela ọnụ ọgụgụ dị ukwuu nke gravure na-emepụta ngwá ọrụ maka ọtụtụ narị efere na-eme ka ndị na-emepụta ihe n'ime na n'èzí otu ahụ ma na-akwakọba ahụmahụ bara ụba.
Wepu nchara, mmanụ n'elu , ọbụna ink na cell nke roller.Matte ma ọ bụ Polish mmetụta.Pressure nke ịgba , ọsọ, na ugboro kemeghi.Cantilever ọdụ ụgbọ mmiri na isi clamper.Totally ekpuchiri uzuzu mkpuchi.Sistemu eji emegharị ájá.