White is one of the most difficult colours to print. To print a white on a coloured background with an ink is even more difficult.
WOW! has three shades of white powder which are completely opaque and this one will raise as frothy seafoam regardless of the background colour.
How to use:
Stamp image with a pigment ink pad.
Sprinkle embossing powder over image, shake off excess and return to jar.
Heat powder with a heat gun until it melts. Do not over heat.