I received a swap recently with this technique and the instructions on the back of the swap. The card is at home right now, and I'm not, so here is what I remember....
1. Stamp an image in black Staz On onto a window sheet (detailed works best)
2. Turn the window sheet over and dab or sponge white craft ink over the back of the window sheet.
3. Take a few reinkers and dab or sponge colors onto the craft ink, be careful not to muddy the colors.
4. Sprinkle clear embossing powder over the inks and emboss carefully.
5. Trim, mount, embellish as desired.
If I left anything out or gave wrong instructions... please correct me. I want to try this technique
Question about acetate frosting
