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Amen - and for more understanding go to <www.systembrunner.ch>

Here's my thought's on the color bar. If you apply the GCR values (50%) that represent standard deviation variance (+/-2% gain) to the gray patch, the only "change" you will see or measure will be beyond "standard deviation". . .even if the images are 80% GCR and won't change. . the press will...

dot gain dot gain Studies have suggested that even an increase of .20 density (which would be beyond the standard range) would only increase the dot gain 2%. Dot gain is changed by roller pressure, water balance, viscosity, temperature, ph&conductivity, more so than SID

Felix Brunner says that color shifts are caused 80% of the time, because of dot gain, only 20% because of solid ink density. So what do we measure? SID . . .go figure! The absolute best color is achieved when the solids are near correct and the sheet is in gray balance, even if it's a little...

Here's my teaching method- use a densitometer set with "all" filter readings. The "V" number is the "visual" density reading, generally around .60. The 3-filter readings show Y-M-C representing each filter reading. If the "V" number is high - then you need to lower the higher Y-M-C numbers, if...

densitometer densitometer Here's my teaching method- use a densitometer set with "all" filter readings. The "V" number is the "visual" density reading, generally around .60. The 3-filter readings show Y-M-C representing each filter reading. If the "V" number is high - then you need to lower...

no color bars no color bars I would print a test form that I could measure, collect the "data" Density, dot gain, gray balance, etc. Make adjustments to the plate curves to print "standard" numbers. Now if you get 'close' on density the color will be more accurate. It would be nice if you...

Just to add, the Pantone book (PMS to Process) is printed to the SWOP specs, or at least that's what was printed in their old books. Density 1.00 Yelo Mag 1.40 Cyan 1.30 K1.70. problem is the dot gain was 20%Mag and 24%Cyan (the spec was 20%Mag/20%Cyan) so that's a 4% "cast" towards Cyan. Plus...

I guess I don't understand your question? What do you mean "direct relationship"? If you measure print contrast solid vs 75% and you increase density, you change print contrast (the screen tint) so maybe there's some "direct relationship" there? NO?

I have read your "unbalanced" guide- many items simply untrue. Like your quote "as far as I can determine, there has never been a formal, objective, study of the relationship of grey balance targets measured in press sheet color bars and how they relate to the live image content of the press...

Let's see if I can explain- equal amounts of R-G-B equal gray, so the measurement of Cyan(-R filter) Magenta(-G filter) Yelo (-B filter) in equal density value, (i.e. Y.58 M.58 C.58) equals gray. Color is made from both the density and size of the dot, since the pressman can't easily change the...

Hi Erik, we would increase or decrease density of Y-M-C to create a perfect gray from 50C/40M/40Y (the patch we read). Of course this is after the plate curves were made under a stable condition. see System Brunner AG for more information. Dan Remaley 412.889.7643

Simply not true. . .there's nothing WRONG. . dot gains change all day long and the relationship between Mag/Cyan gains change the gray balance and therefore color. The "secret" to color printing is keeping the dot gain relationship constant. I have a great printed reference that shows this...

Felix Brunner would take exception to your claims. He knows more about printing than you, me or anyone. . alive or dead! He controls color by measuring midtone dot gain and adjusting the density accordingly but the MEASUREMENT is gray balance. Don't be foolish follow the professionals! Dan...

For more than 50 years color seps. were made to SWOP standards, (litho had no standards) so the publication industry attempted to get the web printers to proof and print to a standard. Photoshop's default is at, or near, this same 20% midtone gain. In my opinion the best numbers to print to are...

Also Note that Status-T (INCLUDES PAPER) - MANY OF THE GRETAG INSTRUMENT'S SUBTRACT PAPER FROM THEIR READINGS. Dan Remaley

Hi Angie, I feel your 'pain' with the G-7 stuff. I was at GATF when Don H. developed it. It requires you to run more Magenta (not a good thing) and more Cyan to compensate for the "Magenta cast". I recommend printing lower densities 1.30 Cyan 1.40 Magenta, you'll be a little off the "Delta...

Call GATF, ask for Dillon Mooney. GATF had a very small color bar element that had diagonal lines with a solid area behind it, you could make it digitally. When the lines expanded (too much ink) or the solid "snowflaked" (too much water) - this is a visual inspection. American Priinting &...

I can tell you from being a consultant for GATF a number of years, that most printing companies have no budget for training. I was a process control consultant and found less than 5% of the printers have a process control system in place. Other issues are that they measure the wrong data at...

I would go to the next step with TPM (Total Production Maintenance). It's a 3-legged stool with focus on maintenance, calibration and process control. Management could then instill TQM (Total Quality Management), based on Edward Demming's teachings - i'll be your "external champion". Dan...