The ‘K‘ stands for “key,” as in key plate. The three primary inks, Cyan, Magenta, and Yellow, are aligned with the press’s key plate, which produces the fine details, outlines, and contrast with black ink.
Some thought it stood for the K at the end of the word “Black” and others thought the K was thrown in so that Blue would not be confused with Black if the letters were CMYB. Good effort but not true!
And the winner is Mr. Steve H. of Western Colorado! Steve, you win 100 free business cards for having the 15th correct answer!!
Congratulations and thank you for playing!