You may recall I previously experimented with using raku aluminum foil saggars to approximate pit firing. That first time, I just tried it on one piece of burnished pottery; I liked the results!
At this recent workshop, I did two more. I also added some combustibles I hadn’t yet tried: Miracle Gro fertilizer crystals and Zep Root Kill crystals (copper sulfate pentahydrate). If I were doing actual, controlled experiments, I would test one variable at a time and then combinations of two at a time, three, and so forth. However, I have to pay firing fees for each piece of pottery I take to these workshops, so instead I’m being pretty liberal with my variables.
I strategically placed root kill crystals, Miracle Gro, coffee grounds, banana peel, copper mesh, copper wire, and steel wool in and around the bowl below. This time, I tacked the crystals and powder to the foil and the bowl with hairspray, so it could stay in contact with the interior and exterior sides instead of just falling to the bottom. I wrapped that all fairly tightly with a layer of aluminum foil. Then I poured some salt on and added another two layers of aluminum foil, hoping to get some cool fuming reactions.
I waited to see how the bowl turned out before committing to doing another with this same finishing technique. I admit that I was hoping the new crystals I added would have contributed a wider range of colors, but I nevertheless liked the result.
However, I wanted even more finer carbon marks on my second piece (a plate), so I used the same ingredients and added a small sprinkling of sugar as well. I again put some salt between the first and second layer of aluminum, and it didn’t seem like it required a third foil layer for coverage (it was easier to wrap the flatter form) so it got fired with just two.
I adore this plate - it’s either tied for my favorite piece from this firing or might take first place.
