Illustrator CS6 - Black?

hi,

 

in illustrator document in rgb mode, why black r 0 g 0 b 0 translating c 91 m 79 y 62 k 97 default? isn't weird? mean use 4 times more ink print black?

 

still in rgb mode, when try make black c 0 m 0 y 0 k 100, defaults c 75 m 65 y 62 k 82 (r 34 g 34 b 33). why?

 

however, in cmyk mode document, can black c 0 m 0 y 0 k 100 , translating r 34 g 34 b 33.

 

my final question why same r 34 g 34 b 33 black translates differently in cmyk depending on color mode of document?

 

- c 75 m 65 y 62 k 82 in rgb mode

- c 0 m 0 y 0 k 100 in cmyk mode

 

thanks

vincent,

 

it inherent limitations in conversion between 2 fundamentally different colour modes.

 

illy best help, trying make least worst (non) equivalent colour.

 

http://en.wikipedia.org/wiki/rgb

http://en.wikipedia.org/wiki/cmyk_color_model

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