make alignment easier when making the stack.

 

When ready, select:

 

Image > Mode > CMYK color

 

On the channels pallet right click on and delete the black, yellow, and magenta channels leaving only cyan.

 

Next select:

Image > Mode > grayscale

 

And then:

 

Image > Mode > duo-tone and select monotone

 

At the color picker select a pure cyan using the table below.

Cyan is:     RED = 0     GREEN = 255 BLUE = 255

Magenta is:   RED = 255 GREEN = 0     BLUE = 255

Yellow is:    RED = 255 GREEN = 255 BLUE = 0

Black is:     RED = 0     GREEN = 0     BLUE = 0

 

Close the dialog and save the image as a copy adding a C to the file name, revert to the original and repeat the process for each of the other channels adding M, Y, and K to each file name respectively.

 

Note that in each of the colors the complementary is equal to 0 while the other two are at full saturation. There is really no need to apply a duo-tone to the black as it is already there. Changing the opacity of each separation when printing can control color balance.