Wax Tablet Case

[fishguy]

Actually if you want to get really hardcore about the lampblack there is a method I saw on a video that demonstrated methods used to make india ink. They had shallow dishes of canola oil with a wick. The wick was lit and the dish loosely covered with a ceramic pot to catch the soot. I have no idea how long this takes, and of course you need to be careful of fire danger. However, they were harvesting pretty big quantities of soot (what lampblack is). Bone black mixed very readily with the beeswax and I imagine lamp black will do the same. It is probably the same pigment in your water color, but the binder in the watercolor is not miscible with the wax.

Have fun, took me a while to get the hang of pouring those things and getting a nice level surface, preheating the frames helped a bit. Yet another thing that was an everyday object for thousands of years, that most people don't have a clue about today.