Digital BW, The Print

I'm just trying to find some information regarding the difference 
between a profile and curve when printing.  

When using carbon-6, there are 6 different dilutions of ink.  Does the 
profile control which "colors" or ink channels are used the way a curve 
or a RIP controls which ink is used?

I guess I'm just curious in regards to printer function. I suppose that 
the dilutions are not the same densities as their respective color 
equivalents... If I were to randomly place ink positions, would a 
profile take care of this?  

Thanks,
Earl