Yep, science is fun Richard. I did some web surfing yesterday to learn more about liver of sulfur and how it's used to antique silver, brass, and copper. I found a youtube video by a guy who dipped silver jewelry into a solution of liver of sulfur, removed the pieces fairly quickly, and neutralized them in water. He got all sorts of color flashing from straw yellow to purple, put me in mind of color case hardening.