Hello
Man I am struggling with this. So attached is an image I need to print on black. My UV printer does white, but the gradient is causing me some concern. It was suggested to do two files, my CMYK file, and a white base file, the issue though, is how do i extract just the white when the opcaity is mid range on the black? I can create a spot channel for white, but the original art contains a glow, and when I select just the art in the layer, even with the tolerance at 1, it selects the whole aura of the glow. That will cause my spot channel to print white under the entire marquee. Do I need to flatten the image and extract all black? And then make the remaining pixels my white base? Im so lost on this. Thanks for any help. On the right you can see how the file was originally created. The glow is around the chest, above the body and legs and throughout the hair.
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It may be best to work on a duplicate image. You may or may not need to flatten the duped image to make this easier. You will likely be making a spot channel. The apply image command may be more accessible. I’ll post more later.
EDIT: Is the figure in layers, such as a solid fill/outline, with the shading separate etc?
Here is a quick example of an alpha channel/spot channel built with some Apply Image moves, invert, burn tool, paint brush... It would need more work, this is just an example starting from the red channel of your screenshot. The original layered file would offer more flexibility. You may need to extend or reduce the glow, fix banding, darken the glow to make whiter etc.
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