When I do gradients that blend together, I like to use an index separation. It's incredibly easy to do, if you just search around for it I'm sure you can find a video or at least step by step instructions.
But here's the gist.
Make sure your image is sized correctly and in RGB mode. Also is at 185 resolution.
Go to Image-mode-index, Then in the "palette" option box choose custom,
"Matte" should be, "none"
"dither" should be, "diffusion"
"amount" is "100%"
and make sure preserve exact colors is checked.
Click ok
A new window will pop up. Start at the top left corner and select all the little boxes. Choose white as the color for all of these.(this is just to clear out everything to start.
Then click on the top left box and select the first color you want to use. (just click on your image where the color you want is solid)
Then do the same thing for your second color, and so on depending on how many colors you are printing.
Click ok.
Your image will look a little goofy but don't worry.
Now change your mode back to RGB.
You can now separate out your two(or however many colors) using your magic wand or color range.
I hope this helps.
But here's the gist.
Make sure your image is sized correctly and in RGB mode. Also is at 185 resolution.
Go to Image-mode-index, Then in the "palette" option box choose custom,
"Matte" should be, "none"
"dither" should be, "diffusion"
"amount" is "100%"
and make sure preserve exact colors is checked.
Click ok
A new window will pop up. Start at the top left corner and select all the little boxes. Choose white as the color for all of these.(this is just to clear out everything to start.
Then click on the top left box and select the first color you want to use. (just click on your image where the color you want is solid)
Then do the same thing for your second color, and so on depending on how many colors you are printing.
Click ok.
Your image will look a little goofy but don't worry.
Now change your mode back to RGB.
You can now separate out your two(or however many colors) using your magic wand or color range.
I hope this helps.