If you have been frustrated with red, I have tested Nurture's new Red Obsession mica. This was made purely from micas. Nurture's Really Red will give a good red, but it's easy (at least for me) to use too much and get some bleeding and pink lather, it still requires gel for the best coloration and it is a pigment. Going forward this will be my go to red. Adding some Really Red will give a true red. The lather test was white
In the picture: top left is made with Ruby Red, top right is Red Obsession alone, and the bottom is 2 parts Red Obsession and 1 part Really Red. I've included a red Nurture measuring spoon as a basis for comparison, since monitors do differ.