Providing formulas for the TVI curves is useful in that target TVIs may be determined for tone values not included in the table. I would like to propose that the formulas be presented in a way that is perhaps a little more user friendly and readily calculated.

A quick look at TVI curves For this study, I investigated spectral data on tone ramps of 394 different inks. Figure 1 shows a random selection of the TVI wm curves from this set of spot colors. For the most part, the TVI mw values were quite large, and in some cases, astronomical. This data is gravure, so a typical TVI for a CMYK ink is around

Jun 15, 2009 · Having a documented standard for dot gain/TVI also helps print production to forensically determine whether a color shift (as in the right side of this image): is caused by incorrect curves applied to plates, too high SIDs, slur, doubling, pressure/squeeze, etc.

Nov 21, 2017 · TVI aim values in ISO 12647-2:2004 are specified as densitometric TVI, as described in sections 4.3.5 and 5. Hi! Here https://cielab.xyz/TVI.php any discreteness and standard 2004 or 2013 curves. The space between curves is also described.

Stepped ramps of two colors, reflex blue and rhodamine red, were printed and measured, and adjustment curves applied as follows: The upper two ramps were aligned to 17% TVI (at 50%), while the lower two were aligned to 0% CTV.

An individual NNC curve is applied to each separation (CMY). For the black separation, a traditional dot gain/TVI curve is applied. Matching a common tonal curve, the NPDC corrects for dot gain/TVI, ink trap and gray balance simultaneously.

• User-defined custom TVI target curves • Special ink calibration for CMYK+ printing • Spectral VPR applies curves to full spectral data

Feb 14, 2010 · Dot gain, or tone value increase (TVI), is a normal part of the print reproduction process. Controlling tones using calibration means that you can manipulate the exact size of the dots on the printing plates so that tone saturation and …

Jun 4, 2024 · Tone value increase (TVI) curves: TVI curves plot the relationship between the dot percentages on the printing plate and the corresponding dot percentages on the printed substrate. These curves help visualize and quantify the extent of dot gain across different tonal values.

A TVI curve can be numerically described as having coefficients for the 50% TVI, for the “lean” of the curve, and for the “bulge” of the curve. These three coefficients are expressed directly in the formula so that they can be readily determined.