I may or may not paint today, but I wanted to post to report what happened to me yesterday.
I painted with ten drops, with good results. However, later I decided to paint again, and to use that to see how long before the color would go away. It was still there this morning, or so I thought. What actually is there is the color from a very mild burn, like a faint sunburn. Certainly I used too much for that area. I am sure I could put that much on a knee, for example, with no burn.