Hi, In need of help creating a simple effect to image.

Question

Attached is an image which shows more or less the effect I am needing to achieve.
http://i303.photobucket.com/albums/nn149/Jaybeedubya/FotoliaComp_635945_xs3N3VFLwPNTIOm1.j pg
I created the image above by desaturating the colour image of the man and then adding a new purple layer and selecting 'vivid light' from the layer palette drop down box. In doing this the man became purple but the white area surrounding him stayed white...I then adjusted the layers on the first layer so that the white part became purple - the final result is what you see in the attached image.
The problem is this - I need to create this effect for 15 or so images all with a specific purple pantone colour, I need to create these for print ready artwork. All the pictures (ie the man) I will be using, need to look the same kind of shade. The way I was creating these before was to adjust the bottom layer so its grey rather than white so that the white area becomes purple.
Confusing huh, If you dont understand my question (and I dont blame you!) then all I need is to create a set of 15 images that look like the attached image (using a specific pantone) but I have no idea how the best way to do it is.
How would you guys achieve that? Any help greatly appreciated.

Answer 1

So its gonna be a two-color-job?
Because with the extreme depths adding Black at least might be beneficial.
You could make a Selection of a black&white-version-of-the-photographs luminance, inverse it and, in the Channels-Panels PopUp-menu, choose Add New Spot Channel for the Foreground color and select the Pantone color.
Then Add New Spot Channel for the background-color and fill that solid black and hide the layers that contain the composite of the photograph.
This should leave You with blank composite channels and the two Spot Channels visible.
Indesign can handle either psd- or DCS2-files containing Spot Channels.
The problem I perceive here is that depending on the print-process and the background color selected it might proof necessary to knock out the foreground elements if the company is very strict on their CI colors. Unfortunately simply inversing the foreground selection would probably not work as this might leave the mixed-color-areas greyish.
Are the prints gonna be offset or silkscreen?