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...]
#21: The Reality of Remote Color Diagnostics
*** Golden Nugget #21: The Reality of Remote Color Diagnostics *** While at the PIA/GATF Color Management Conference earlier this month I had a chance to visit with a customer who uses our new ProofPass.com proof certification and remote color diagnostics solution. Our customer is responsible for … [Read more...]
Sometimes less than ideal is good enough
I was speaking with a new customer last week and he shared with me how he has been using ColorMetrix software to monitor his pressroom. His goal is to get his proofs to match his press sheets. This customer has a 54” not so new printing press and he is using ColorMetrix to monitor print … [Read more...]
#19: Is your yellow ink contaminated?
Back in the dark ages of densitometry we utilized calculated values like Hue Error and Grayness to answer the above question. The reality we have been dealing with at ColorMetrix over the last several years is that spectral data will ultimately rule in our industry. While I do not expect press … [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...]
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