Comparative Analysis of Densitometric Tonal Value Increase and Colorimetric Tonal Value Increase

Pages:42-45
Dinesh C. (Service Engineer, Creation Offset Press, Ernakulam, Kerala)

The tonal value increase in printing denotes the dot gain that should be considered at the time of print quality assessment. That is indirectly connected to other print quality parameters such as solid ink density, print contrast etc. Tonal value increase is higher in middle tone patches of process colors. The TVI can be considered both colorimetrically and densitometrically. The use of two cyan color inks has same tonal value but there will be an apparent hue shift. The densitomeric TVI only consider the process control and colorimetric TVI combines both process control and image appearance. The Densitometric TVI is measured in M3 mode and Colorimetric TVI is based on M0 mode. This research paper shows the densitometric TVI values are higher than the colorimetric TVI. The black color patches shows higher delta TVI and yellow color patches shows lowest delta TVI.