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Input/Output/Workflow Scanning, printing, color management, and discussing best practices for control and repeatability

Additive/Subtractive

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  #11  
Old 08-19-2001, 08:58 AM
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kathleen kathleen is offline
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red + yellow = orange is the truth as i used to know it. yellow doesn't make the cut any more for primary.

i think what dj meant is: why is ink not equivalent to paint? yellow plus red in paint equals orange, why not in cymk?

i'm sure it is about light @ it's heart, i read something once that made me think that it had to do with paint being opaque "stuff"; all real vague to me, and, i'm also sure full of physics and stuff i will have to squint to understand.
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  #12  
Old 08-19-2001, 09:10 AM
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Exactly!!
DJ
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  #13  
Old 08-19-2001, 09:38 AM
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Well, just out of curiosity, what combo of C, M, and Y makes red? And if you add Y to that, is it orange?
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  #14  
Old 08-19-2001, 09:42 AM
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Magenta and yellow. Figure that one out Here's a red with a little purple in it mixed with yellow to get pure red. Oh wait a minute Purple and yellow cancel each other out because they are opposites and you are left with the red. Now I get it....No I don't.

OK Kathleen, you started this mess. Now we're really confused.
DJ
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  #15  
Old 08-19-2001, 09:54 AM
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So equal parts M and Y make 'red'...add some more Y to 'red' and you get orange. Where's the confusion?
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  #16  
Old 08-19-2001, 09:54 AM
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Huh?
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  #17  
Old 08-19-2001, 09:59 AM
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The confusion is why start out with magenta to begin with. Why not just mix red and yellow for orange instead of magenta, red and yellow.

I think I'll stick with paints. I understand those better.

I'm with you ED
DJ
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  #18  
Old 08-19-2001, 11:06 AM
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Red=R, M=Magenta, Y=Yellow, O=Orange

R=(1xM)+(1xY)
O=((1xM)+(1xY))+(1xY)

In the subtractive color system, red is made up of contituent parts, you add more yellow to those parts and get orange

Paint=thick ink

The confusion lies in mentally mixing up two color systems. "Primary Colors" mean the base colors that all other colors are made from (in a given system). Magenta isn't 'red with a little purple in it' in the subtractive system, it's one of the three pure colors.

I'm really sorry if I'm messing you guys up with this left-brain stuff.

Someone post a great link explaining color theory here and bail me out
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  #19  
Old 08-19-2001, 12:01 PM
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I think you're just enjoying toying with us on your birthday. :p

Ed
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  #20  
Old 08-19-2001, 12:09 PM
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Gee, Black and White type stuff is becoming increasingly attractive!! Tom
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