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...]
#23: TVI is a better term than Dot Gain
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...]
#22: Why 95 is more than 100
When printing with the flexographic (Flexo) printing process it is not uncommon for the 95-99% tone patches to have reported dot areas greater than 100%. While visiting a ColorMetrix customer last week I got a refresher course on why this phenomenon occurs. So, I thought I would start the year of … [Read more...]
#18: Is all dot gain (TVI) bad?
In one form or another I am probably asked questions about dot gain being “bad” more than any other technical question. The short answer I have always given to this question is no, dot gain is not bad; but not knowing what your dot gain is can be very bad. Also, dot gain is no longer … [Read more...]
Golden Nugget #5 Density & TVI or L*a*b?
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...]