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Proper Lighting Conditions
Thanks to GTI, this PDF shows some common specifications that are included in the ISO 3664:2000 guidelines.

Thursday December 18, 2003
by GTI Graphic Technology, inc.

A lot of discussion on proper lighting and environmental conditions in the digital darkroom have been discussed. Here is a PDF from GTI, the makers of excellent light boxes. It does provide some information from the ISO 3664:2000 standard.

Weekly Chatter:Need for Correct Exposure in RAW
Wednesday November 26, 2003
by weekly chatter

Each and every week, Imaging Revue offers non-members a tantalizing taste of the information available within our forums. Make sure to check out the entire list!

Soft Proof Tutorial by John Paul Caponigro
Monday November 24, 2003
by John Paul Caponigro

John Paul Caponigro walks the reader through the processes of soft proofing images in Photoshop in this elegant and useful PDF excerpt from his book "Photoshop Master Class". orders placed through John Paul at info@johnpaulcaponigroarts.com receive a free PDF Guide to Getting Good Color.

Weekly Chatter:Photoshop CS - Print with Preview settings
Thursday November 20, 2003
by Imaging Revue Experts and Members

Each and every week, Imaging Revue offers non-members a tantalizing taste of the information available within our forums. Make sure to check out the entire list!

Greg Gorman's B&W; conversion technique
Tuesday November 18, 2003
by Greg Gorman

Greg Gorman shares with the Imaging Revue subscribers, a technique that finally allows him to shoot color and still get the B&W; effect he desires. Designed by his retoucher Rob Carr, this step-by-step tutorial will show you a great new way to not only convert color to B&W; but add color toning as well! Please refer to the forum thread that got this discussion started.

...see more articles(many more!)

forums

Color Management/WorkFlow > Hardware and Software > Minimum patch requirement

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AuthorSubject: Minimum patch requirement   [Go to Bottom of Page]
Vjeran Andrasic
Posted on Sat Dec 27, 2003 5:34 AM
What would be the absolute minimum requirement for creating a CMYK profile which you can use to work with? Im talking about number of patches and what should they be?

My first guess is 5 or so:
Cyan - 100%
Magenta - 100%
Yellow - 100%
Black - 100%
White - no ink

This still doesnt tell us about color interactions (mixing) and dot gain.

If I add Cyan 50%, Magenta 50%, Yellow 50%, Black 50% will that make a profile that can fairly compensate for dot gain?



Problem is that I have one quarterly magazine at this offset printer whose staff doesn't even know their presses Total Ink and Dot Gain, not to mention profiles and stuff.

(Actually their main tech guy has heared of profiles but he thinks that no matter which one you use you always get the same CMYK separation plus/minus 1%)
-*smack forehead*-

Thir control strip is consisted of 5 patches only C, M, Y, K, CMY, each at 100%.

When they measure it they show me that Cyan, for example, is at 1.55 (Im guessing that some kind of ink density or something - what is it?).

Im talking here about not so small company that has four 8 color press machines and one web? (we call it "roto") line.

Im forced to work with em since my boss went after them coz of rather popular price they gave.


Good thing is they are willing to print for me a little target, id say up to 20 patches in one single line alligned vertically on the printing sheet.

My question is:
If you had to choose 15-20 patches total for making a CMYK target, what would they be?
I would also like to get an answer on that 1.55 measurement and what that number means?

Im not going here for super precise profile, Im just trying to make a guiding profile that will help us make separations that are not really off so much.


Additionaly, I will have to add a small target which I could use to determine printers Total Ink Limit/Coverage. Does anyone have such target?
I have found one (
http://www.hutchcolor.com/Images_and_targets.html ) but it has many patches and I dont even know how to read it once it is printed.
Can anyone tell me how to read that printed target and how to pick, say, 5 - 8 patches to get approximate TAC/TIL?


Once again thanks alot in advance, Merry Christmas and Happy New Year,

Vjeran


... this thread contains expert advice from Andrew Rodney.




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