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Maybe you could add a reducer to get a little more gain to match the other machines? Just a thought. . . .

Delta differences vary - depending on the color. If you look at the CMC elliptical Chart showing Lab color space you'll notice that 'Reds' have a smaller eclipse than 'Greens'. Therefore we will accept larger variations of Greens than Reds! Note the size of neutral grey - very small! A 2% dot...

Try this- create plate curves from these numbers. If you can create the correct density & 'dot area' numbers on press you'll have a great press sheet! I did this years ago on a 2 color press. Dan

See the attached document. Here are the "Wanted" dot area numbers for the RIP. Questions? Call! Dan 412.889.7643

If you can't afford G7 help -I created a simple method to achieve Grey Balance at press. I have included the "Wanted" numbers for the pre-press. Try it and let me know your results!! Call with any questions- Dan 412.889.7643

Go to System Brunner - he has examples of picture classification and process variation. The PC Reference shows a 2-4-6% color shift to Grey. (standard deviation is +/- 2%). That's why GCR is applied to decrease deviation of near neutral items. Questions? Dan 412.889.7643

Check out this reference piece, showing grey balance.

I have many training articles from Brunner, contact me directly to send items. Here’s a couple-

A few of us believe that printing to grey balance at press is important. Many can’t afford G7 or a consultant for help. Nearly all the RIP’s have a ‘measured’ file and a “WANTED” file. Has anybody ever supplied the values for this ‘Wanted’ file? We’ll I have, I measured many sheets and averaged...

See if this helps. . .

Here is a simple method to get great color reproduction, including uncoated! IF the printer will work with you . . .

Here's an easy method to get the best reproduction. . .

In Photoshop, some colors do change a little (depends on the color) - less change from dedicated software. In either case, there will be less variation in color during the press run than a traditional or UCR scan.

Print a GATF test form with ladder bars. The bars will show any distortion front to back / side to side. The spec. Is .06 density front to back. Call with any questions 412.889.7643

Here is a great example of GCR - open these images in Photoshop and look at each color side by side. . .

Email me and I’ll send you a copy of the best book I know for color reproduction. ‘Color Control in Lithography’ [email protected]

Here’s my nickels worth- GCR affects all tri-chromatic colors (Y-M-C). The ‘graying’ component of a color is reduced and replaced with black. I.e. “reds” graying component is Cyan. Blues graying component is Mag. GCR - “pushes” the tone scale to be more saturated or less saturated in the...

Attached is the User Guide for Ladder Bars that will truly show press problems. Call with any questions 412.889.7643 or [email protected]

Printing 50/49/40 is impossible! These values are at or near the midtone area - where the midtone dot gain changes under the best conditions (+/- 2%} is the standard deviation of a good press! So as long as these gains climb together- you get a ‘darker’ grey - when one goes up or down relative...