I am still experimenting with Transfer-eze on black wool.
I pre-soaked the black fabric and didn't get much dye discharge. I thought I would be safe.
And for the most part I was.
The colors on the front of the
embroidery came out crisp and clear. I have
learned to always
embroideries face down on
a fluffy towel.
The towel protects the 3-D texture of the stitching. Being face down draws any color discharge to the back of the fabric instead of the front.
I just learned today that angels with multicolor wings are traditionally archangels. So this is an archangel watching his flock by night.