Converting Image to 3 Layers for Silk-Screening

[bwackv]

Hello! I'm making a poster for silk-screening. Each color needs to be on a separate layer so that each color can be hand-printed one at a time. Foolishly, I did not draw the colors on separate layers. I need a layer for the white outline, a layer for the purple, and the remaining layer the black (which will just be the color of the paper for those familiar with silk-screening). Posterizing doesn't seem to work, and selecting color range doesn't seem to nail it exactly either. I would greatly appreciate any help.

I am attaching the PSD file. Please do not reproduce this image (though i don't know why anyone would!)

 

[hawkeye]

See if this helps:
http://layersmagazine.com/spot-color-separations-in-photoshop-cs5.html

 

[ALB68]

To make the screens you will have to color separate it. The way I do it is to use the channels panel. Flatten the image. To separate your colors, and I am assuming this is like a simple 3 color design, you simply pick up your magic wand tool, uncheck contiguous, then select the first color, all of that color in the image will be selected. Once selected, open the channels panel and down at the bottom click on the icon that adds a new channel. Do the same thing until you have the new channels. These channels are greyscale. I print them to transparency film with an Epson 1430 printer. You want to get your black just as opaque as possible. Print each one on a separate sheet using registration marks. My print driver has registration marks option. The Epson driver requires your paper size to be bigger than the graphic before it will print the registration marks. Once done, you use the transparency positives to burn your screen. I asume you know that process.