Re: [FCP-L] Best way to Matte White Screen

RGB and CMYK colors are additive when viewed via an emissive medium
like a computer monitor. CMY colors are complementary to RBG (and vice-
versa I suppose). RGB and CMY are also inversions of each other in the
standard additive Hue wheel (R-C, G-M, B-Y). YCbCr are also additive.

"RGB" (or "CMYK") mixed oil paints on canvas (or photos printed) is
subtractive. Your printing app or the printer does the conversion from
an additive RGB or CMYK monitor color space to a printer printing
color space which translates properly onto the subtractive printed
paper. The K of CMYK is traditionally necessary to get full
subtractive blacks on some subtractive output devices where CMY (or
RGB) tends to be more muddy brownish black then full black (but
depends upon the subtractive output device). My Epson R2880 prints
rich full blacks transparently. So it is less off an issue to futz
with when using modern inkjet printers.

James

On Oct 26, 2009, at 4:37 AM, Roger Shufflebottom wrote:

> Just to stir the pot, I was looking in the Help for Adobe
> Illustrator this
> morning and I happened on the following:
>
> "RGB colors are called additive colors because you create white by
> adding R,
> G, and B together—that is, all light is reflected back to the eye.
> Additive
> colors are used for lighting, television, and computer monitors. Your
> monitor, for example, creates color by emitting light through red,
> green,
> and blue phosphors."
>
> On 25/10/2009 22:40, "Kerry Soloway" <ksoloway@gmail.com> wrote:
>
> > Indeed, we are discussing Additive vs. Subtractive.
> >
> > If I remember high school art class, although theoretically mixing
> all
> > colors creates black. In fact, it creates brown. That is why, I
> believe,
> > they need the K in CMYK. Mixing any two complements of colors
> (opposite
> > sides of the color wheel) create brown. Well, if you use all
> colors, you
> > have every color with its complement. Thus you are mixing brown
> and brown
> > and brown, etc.
> >
> > It was something that always puzzled me.
> >
> > Kerry
> >
> With best wishes,
>
> Roger Shufflebottom
> Avid Certified Instructor
> http://www.bottom-line.tv
> Tel: +44 1992 535 031 (UK)
> Mobile: +44 7973 543 660
>
>

[Non-text portions of this message have been removed]

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