Forum: Photoshop


Subject: CMYK and green....

Grimtwist opened this issue on Dec 19, 2002 ยท 8 posts


Grimtwist posted Thu, 19 December 2002 at 5:09 PM

Anyone noticed that Green is not very compatible with CMYK? It's really annoying, especially when you're trying to do vegitation.


retrocity posted Thu, 19 December 2002 at 10:06 PM

Green is one of the reasons understanding CMS, Calibration, Color Space, (and all those other mind numbing subjects) is critical.

(it's also why i hate that phrase "Eat your VEGGIES!!")

:)
retrocity


ReX posted Mon, 23 December 2002 at 6:19 PM

if you're in RGB mode than turn on the Gamut warning (under the view menu). Anything that turns up gray is out of the CMYK gamut and won't look the same when you print it out.


Grimtwist posted Wed, 25 December 2002 at 12:53 AM

I know, I do that already. It sucks because you can never use brillant shades of green - it's always going to be out of gamut.sigh


Hoofdcommissaris posted Mon, 30 December 2002 at 11:02 AM

Nevertheless I have to add that, working in cmyk most of the time, I tend to be very happy with the brightness one can get in greens. The recepe of 100% yellow with something between 50% - 75% cyan gives very nice greens in print. Getting rid of magenta and too much black, and crank up that yellow can be of great help to get some eatable green in your veggies (actually, in Dutch, vegetables are called 'groenten'. Groen being the word for 'green'). The selective color adjustment layer is great for regaining vitamines. In your photographs of food and nature.


Grimtwist posted Tue, 31 December 2002 at 2:10 AM

Hmmm...I've never had much success creating vivid greens in CMYK. I always end with a "dirty" result (I create digital paintings). Perhaps your blend is only good for touching up photos?


retrocity posted Wed, 01 January 2003 at 2:01 AM

Grim, have you tried using the Hue/Saturation to get richer green colour?

I find the Hue/Saturation controls to be rather powerful in adjusting the overall colour in the image as well as targeting individual hues. If you use the Saturation adjustments on the greens you may get what you want.

  1. When you call up the dialog box (ctrl+u) you'll get default of apply your changes to the "Master" colour range (overall colour in the image). Change this to Green (ctrl+3). Move the slider to the positive to increase intensity.

  2. Make sure you have the "preview" check box selected so you can see the effects your adjustments make on your image.

  3. As you make adjustment to the Saturation levels the Colour Ramps will give you a visual reference. The "top" ramp shows the full spectrum range available. The "bottom" ramp shows the new colour range created by your change.

You can also try and "paint" some more saturated colour into the Greens by using the paint brush and setting the "blend mode" to Saturation. You have better control this way because you can also use the "sponge" tool to intensify or dilute your colour.

Just some ideas kicking around in leu of sleep :)

:)
retrocity


Grimtwist posted Wed, 01 January 2003 at 7:11 PM

Thanks. I know how to get richer greens using the various methods mentioned including the hue/saturation, variations, selective colors and channel mixer and so forth, but my original groan was that you still have to dull it down considerably more than other colors when working/converting to CMYK. Hope you get some sleep ;)