The cards I found in the gallery after searching look like simple versmark resist. Starting with glossy paper, stamp your image with Versamark, brayer on your dye ink, then stamp the same image with a darker colored dye ink. The Versamark resists the brayered ink so the white from the glossy paper shows through (though from my experience, the versamark picks up a hint of color so it isn't a true white that is left behind, but it *is* much lighter than the brayered color).
Gosh that was long-winded, hope it helped though
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