Actually Ganoksin has a good informative document on their website.
Here is the URL:
The article says that Liver of Sulfer is a mixture of potassium
sulfides. I use it quite frequently and it is a greenish color, like
army green, not yellow like Azufre. So I guess it is a mixture of
potassium and sulfur to make a sulfide. I think we should call the
solid form, the solid form. They are not really rocks.
I use the solid form. I do not grind it. I simply take a pea sized
nugget of the substance (like a rock, but not a rock) and put it in
very warm water. I mix it and it dissolves very quickly.
In my work, I mainly use it for colors on silver and gold. I like the
beautiful blues and golds you can get from LOS. It does turn black
eventually, but it is not usually what I want.
The order of the appearance of colors when using LOS is predictable.
The colors go from gold, rose, gray, blue and black. There are
probably other colors in between, and I have achieved greens and
coppers as well, but this is what I remember.
Your piece will color faster if it is hot when dipped in the LOS.
Then rinse with cold water to stop the reaction when you get to the
color you want.
Hope this helps,
Laura H. Hastings