Erik: Michael Litscher (Colormetrix CTO) provided this and said that a picture is worth a thousand words. I hope this helps in your understanding of the Visual filter. … [Read more...]
Be more like a blogger Adam said….
OK, every now and then even I give into peer pressure. Wait, can an RIT graduate student be considered the peer of a 20 year industry veteran who graduated from RIT when Adam was hardly out of diapers? In this case yes, Adam is a very bright young man, and anyone looking for a top notch employee … [Read more...]
#26: Density is king
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...]
#25 TVI Notebook (part 3 of 5) TVI is not a bad thing
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...]
TVI Notebook (part 2 of 5) GRACoL & TVI
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...]
Worth a look…
The always awesome RIT grad student Adam Dewitz just posted a very good article on Delta E at his blog: printmode.net I hope to have a new golden nugget posted soon, but until then here is a picture of what I was doing last week instead of writing. ;-) … [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...]
Happy New Year
First, I want to wish all my readers a happy and prosperous new year. Next, I want to let you know that a new Golden Nugget is coming. I plan to have it completed by the end of the weekend, but if not I have published while traveling on business before. One way or another it will be out by next Wed … [Read more...]
Another Printing Industry Blog
-- Jim Raffel was interviewed by RIT Grad Student Adam Dewitz. Adam’s blog is also a growing resource of Printing Industry information. Check out the interview and Adam’s blog at: printmode.net … [Read more...]
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