Another way to convert scanned line art is to make it its own layer and convert it to Multiply (though it will make the lines a little darker, this can be compensated for with dropping the opacity). In short, the Multiply option turns the layer into the equivalent of ink-on-acetate, as the white parts disappear and anything not-white (in this case, black) becomes (somewhat) translucent.
You may also want to browse through the CTRL+Paint videos if you're interested in stepping it up. It's especially relevant to you since 1) you're a Photoshop user and 2) this series is particularly aimed at those transitioning to digital.
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Another way to convert scanned line art is to make it its own layer and convert it to Multiply (though it will make the lines a little darker, this can be compensated for with dropping the opacity). In short, the Multiply option turns the layer into the equivalent of ink-on-acetate, as the white parts disappear and anything not-white (in this case, black) becomes (somewhat) translucent.
You may also want to browse through the CTRL+Paint videos if you're interested in stepping it up. It's especially relevant to you since 1) you're a Photoshop user and 2) this series is particularly aimed at those transitioning to digital.