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#27: Measuring TVI on Inkjet proofs is Meaningless

March 9, 2006 By Jim Raffel Leave a Comment

Part 5: I should start by saying I have covered the topic of using graphic arts densitometry to evaluate inkjet proofs once before. Back in July ’05 GN#5 addressed this same issue so you may wish to refer back to it. I considered changing this topic, because the title is a bit inflammatory. … [Read more...]

Filed Under: density, inkjet, TVI (Dot Gain) Tagged With: densitometry, inkjet, inkjet printer, inkjet proofing, measuring, notebook, proofs, tvi

#26: Density is king

February 28, 2006 By Jim Raffel Leave a Comment

Part 4: TVI is not measured it is calculated from density which is king. All the other values our modern densitometers display are simply calculated values from the densities the instrument measures. In short, all a densitometer does is transmit a predetermined amount of light and then measure how … [Read more...]

Filed Under: density, TVI (Dot Gain) Tagged With: calculate value, cyan, densitometer, density, ink, inkjet printer, magenta, measuring, notebook, printing press, tvi

#25 TVI Notebook (part 3 of 5) TVI is not a bad thing

February 21, 2006 By Jim Raffel Leave a Comment

Part 3: TVI in and of itself is not a bad thing: Back when TVI was called Dot Gain, I remember going into print shops and having pressman tell me “No, we don’t have any dot gain.” This was not ignorance (they knew they did), but instead a misconceived notion that TVI was a bad thing. I always … [Read more...]

Filed Under: density, TVI (Dot Gain) Tagged With: dot gain, ignorance, notebook, pressman, print shops, tvi

TVI Notebook (part 2 of 5) GRACoL & TVI

February 14, 2006 By Jim Raffel Leave a Comment

Part 2: GRACoL 7 appears to be taking our pressrooms in a direction where TVI will be significantly less importance in monitoring production run stability. Instead GRACoL 7 is based on maintaining gray balance utilizing density and L*a*b* values. Over all, I feel this is the right direction to go … [Read more...]

Filed Under: density, GRACoL, TVI (Dot Gain) Tagged With: notebook, stability, tvi

#23: TVI is a better term than Dot Gain

February 7, 2006 By Jim Raffel 1 Comment

This is Part 1 of a 5 part series from Jim Raffel’s TVI notebook. Part 1: Tone Value Increase (TVI) really is a better term than Dot Gain: My short answer for this is that a densitometer (or spectrophotometer acting as a densitometer) does not actually measure dots, so how can we really call it … [Read more...]

Filed Under: density, GRACoL, TVI (Dot Gain) Tagged With: densitometer, dot gain, Printing, tvi

Golden Nugget #5 Density & TVI or L*a*b?

July 13, 2005 By Jim Raffel 2 Comments

This post now appears as Color Conversations: Density & TVI or L*a*b? on Color Conversations the blog of ColorMetrix Technologies, LLC. *** Introduction *** Next, I want to let you all know that since the inception of the golden nuggets idea both of the Mikes at ColorMetrix (Michael … [Read more...]

Filed Under: density, L*a*b*, TVI (Dot Gain) Tagged With: cmyk color model, color space, density, dot gain, golden nugget, ink, inkjet printer, inkjet proofing, printer, Printing, proofing, tvi

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