TVI
TVI is the Tone Value Increase. Print dots increase when they are printed on paper. A 50 % magenta on a printing plate can show a tone value (TV) of 70 % when printed, so the TVI is 20 %. In the past, these measurements were referred to as ‘dot area’ and ‘dot gain’, which correspond to the tonal value (TV) and the dot gain (TVI). The paper was always 0, the solid tone always 100. This dot gain was used to adjust a printing press to a specific printing …