WARNING: Lot's of graphic art geek talk ahead
For those of you that don't know CMYK are the four colors commonly used in printing, professionally printing. C-cyan (a blueish color), M-magenta (a purplish color), Y-yellow (a bannanaish color) and K-Black (like your soul!!! j/k). Ok with that technicality out of the way, I had an experience the other day where I needed to send some artwork to a printer. This printer, upon review of 
my first submission, told me it would be better to use a 2 color process for this particular job (thus eliminating one of the 4 colors commonly used, in this case M&Y). He then requested that I send him a file in EPS or PDF format that had only Cyan and Black or Black and a spot color (a color from the Pantone Matching System). So I did my darnedest to figure out how to get my cool brushed steel effect and logo overlay done in this cool gunmetal blue. Well to cut the story short I was accused of sending him a file that had locked channels and needed to send him a file with unlocked channels. I searched the Internet looking for how to unlock channels. Couldn't find anything. Anyway I ended up removing all traces of M and Y from my artwork, and low and behold M and Y were hiding out in my black mixture. AH HA I said to my self. So after I eradicated yellow and magenta from every inch of my 24x36 monstrosity, I sent him the file in EPS format with the Yellow and Magenta channels deleted from the Channels palette, just to make sure. I haven't heard anything from this guy in 2 days. I guess no news is good news.
my first submission, told me it would be better to use a 2 color process for this particular job (thus eliminating one of the 4 colors commonly used, in this case M&Y). He then requested that I send him a file in EPS or PDF format that had only Cyan and Black or Black and a spot color (a color from the Pantone Matching System). So I did my darnedest to figure out how to get my cool brushed steel effect and logo overlay done in this cool gunmetal blue. Well to cut the story short I was accused of sending him a file that had locked channels and needed to send him a file with unlocked channels. I searched the Internet looking for how to unlock channels. Couldn't find anything. Anyway I ended up removing all traces of M and Y from my artwork, and low and behold M and Y were hiding out in my black mixture. AH HA I said to my self. So after I eradicated yellow and magenta from every inch of my 24x36 monstrosity, I sent him the file in EPS format with the Yellow and Magenta channels deleted from the Channels palette, just to make sure. I haven't heard anything from this guy in 2 days. I guess no news is good news. I have no reason or purpose to tell that story. Only to document a great victory, I will look back upon this post and say again "AH HA" and laugh... because I'll probably get a call a half an hour before I have to go home from this guy telling me to fix it and resend it!
PS. I hate doing pre-press setup crap!
