It's probably heat sensitive. See Soap Queen blog from yesterday on what happens to Super Green in CP soap:
http://soap-queen.blogspot.com/2009/10/ ... tests.htmlUltramarine Violet turns grey when exposed to heat. I read it but still had to find out the hard way. Batch of HP soap went from purple Lilac to grey Sandalwood Vanilla.
I'm sure there are others. I had some red mica that went orange on me in MP. Oh and then there was the surplus FO that made my pink soap orange.....
Always have a backup plan or recite after me: "That was how I planned it all along"!