I asked about spinach powder (because I was looking for a reliable, natural green colorant), a few weeks ago, and Lavender Lady politely reminded me about nettle. I had some in my soap cabinet, so I ran it through the food mill, sifted it, and made nettle powder. I had never used it as a powder for natural coloring, but I knew it had been done. Well, I promised to post pictures of the finished soap, and here they are!
(Sorry, I took these with my iPhone, so the resolution isn't very good).
Spearmint & Goat's Milk
I also used it to color my "My Husband Is A Redneck!" soap (Hunter's Soap), with anise star and cedarwood EO's. Here is a picture of that soap, colored with nettle powder and cocoa powder:
The soaps are a week old. Assuming they maintain their beautiful green colors, this soap colorant is an outrageous success.
Sarah