"He who marches out of step hears another drum." ~ Ken Kesey
I have spent hours upon hours examining color and its math and science.
lets proceed peacefully and correct the industry....
In the blue corner we have the heavyweight champion! Revered for his sheer dexterity in the art of belligerence, and so far undefeated, yet slightly diminished! On the red corner we have the King of Kalm, with an endless stream of Tranquility his weapon of choice! Unmatched fairness and powerful patience are his tools of the trade!Let the games begin!Ps. HSB, Channels, Layers, blahblahblah. They are bytes in memory and there is no difference whatsoever between them, except PS likes to put color management in channels which it can't do in layers. But you can control that color management, so you can make them exactly the same. The argument is moot.Besides, they're all the wrong color space. Sepping should be done in a linear space, be that Lab, XYZ or linear RGB, it's irrelevant. HSB is directly derived from (s)RGB in a linear fashion.And CMYK? Linear from "some" RGB (sRGB or Linear RGB): C1=255-R; M1=255-G; Y1=255-b; K=Max(C1,M1,Y1); C=C1-K; M=M1-K; Y=Y1-K;Yum! Code! So, everybody's wrong. Who wins?And about "Simulated Process": It's a Freakin' Farce!"Sim Process" is stupid in the sense that Who The Hell is Actually Trying To Simulate Anything? We're printing Shirts! The name of the forum is "TheShirtForum" and Plastisol is the tool of choice. You can print in real process colors, YES, but when you are NOT printing with real process inks, it doesn't mean you're trying to simulate that! That's like saying your inkjet uses a "Simulated Monitor Separation System". WTF? It's totally different. It uses partitive mixing! CMY(K) is subtractive. RGB is additive. They are 3 different things and they can be related by formulas, yes, but they're different beasts!I vote we from now on call CMYK printing "Simulated Tonal Spot Color Printing". I vote we call monitors "Real Life Visual Simulators". And when we print a car on a shirt, we call it a "Visual Vehicular Simulation".I think, honestly, Calling it Sim Process or Tonal Spot, it doesn't matter. Plus, no one gives a crap where the seps come from: The printing is the same: Put ink on a screen and stroke. It's plastisol. It's a spot color. It's partitive mixing. It's a thing on its own and shouldn't be degraded by calling it "Simulated" Anything!But it's water under the bridge. It has been established we call the printing of halftones using plastisol "Simulated Process". And so if we're going to accept that, then let's accept it. And how you get your seps doesn't change hwo you print it. Yes, SP may be a misnomer, but it's an accepted name nonetheless. Get over it.Coudray, BTW, apparently (hearsay only, sorry) has done a bang-up job of formulating formulas that calculate color calculus. Calling him a guru reminds me of an Indian on a rug with incense wafting. I'm sure he knows his crap quite well. This makes him an expert, but not "the" expert.HSB, for those who care to know, is a distorted color space. There's no smooth relation between it and RGB or sRGB. There is such a relation between L*a*b, RGB, sRGB (almost) and CIE XYZ. This is kind of important. A straight line drawn in the HSB space could have a corner in RGB, sRGB, XYZ and L*a*b. HSB is strongly related to L*u*v, but L*u*v does not have the discontinuity issues HSB does. Read more here. Read the whole section, or better yet, the whole page! Know your stuff. There's the Math, right there. No secrets. Just Real Understanding for All. No convincing needed! I mean, truth=truth is truth, no matter who says it or who tries to hide it.That said, HSB seps will trip you up when you select a slightly pink red hue and a slightly red yellow hue, because the line between those colors cannot (ever) reach red (on the shirt). You can't mix ANY non-red to make red. Yet the HSB seps happily select the red and mark it as perfectly separated. That's bad... I mean, it's great but not the mathematically correct answer to the question: "How much of which inks do I need to make this color" for red.Know what a color space is. It's 3D, so it requires a bit of spacial insight. Just be happy we only have 3 different kinds of color cones. If it were 4, it would have more dimensions than we're used to in our lives and it would be that much harder to grasp.And don't forget: Put some Awesome into it. Awesome in, Awesome out!
Hey Tom, did you read the damn article? Are there any unfamiliar terms? If so, you had better read up on them! Note: wiki wiki has links you can click on to find out wtf they're talking about.You must be a quick reader. It's like 15 pages of details and math. Shapes of spaces: Important! Especially note this image. Especially note the "Force RGBCMY into a plane" part. It's what causes the lines in the HSB circle, which should be a hexagon (also see that on that cool page!).There's so much for you to learn, my friend. When enlightenment has found you, then you shall rule the Color Separation Universe. Until then, you are just an amazed bystander, dazzled by the beauty, able to speak of it, but not know it deeply. Deep magic comes with deep dedication. It also is the reward for personal effort. The reward is not, nor an it ever be, the admiration of the blind masses. They cannot see, cannot understand and can not appreciate deep magic. They shall write it off as fiction. Ah yes, all us puny humans fear all we do not know. This has caused bloodshed and destruction for eons and we're not done with it, yet we lull ourselves into believing we live the age of enlightenment today. Totally not. I think there was something called the Renaissance and they all thought they were so freaking enlightened then too. Self deceit, conceit.Be quick to listen and slow to speak. That's the path to wisdom. The crowd will come and follow the wise, often the wise don't seek the crowd, yet it comes to them as a burden in their quest for truth. Those who seek the crowd, in their quest for recognition, often miss the wisdom by miles...