For those of you who are really interested in Oil Spots, there’s an article from 2014 that I think is worth a long look. This particular article was what got me interested in SEM microscopy when I was in Grad School:
Ancient Jian wares are famous for their lustrous black glaze that exhibits unique colored patterns. Some striking examples include the brownish colored “Hare’s Fur” (HF) strips and the silvery “Oil Spot” (OS) patterns. Herein, we investigated the glaze surface of HF and OS samples using a variety of characterization methods. Contrary to the commonly accepted theory, we identified the presence of ε-Fe2O3, a rare metastable polymorph of Fe2O3 with unique magnetic properties, in both HF and OS samples. We found that surface crystals of OS samples are up to several micrometers in size and exclusively made of ε-Fe2O3. Interestingly, these ε-Fe2O3 crystals on the OS sample surface are organized in a periodic two dimensional fashion. These results shed new lights on the actual mechanisms and kinetics of polymorphous transitions of Fe2O3. Deciphering technologies behind the fabrication of ancient Jian wares can thus potentially help researchers improve the ε-Fe2O3 synthesis.
Here are a couple of sets I made using concrete as a glaze material. It was pretty simple to make. The project began after finding two concrete paving tiles in a construction rubble dump. The larger one I kept for the bases, and the other I busted with a sledge hammer into gravel sized chunks. The gravel went into a bisque kiln, and the remaining slab went into the brick saw to get cut in half. Once the calcined concrete came out of the bisque, the friable powder went into the ball mill and ran for a relatively short 8 hours. After sieving out the remaining sand and large pebbles, I had myself a pretty nice looking glaze slurry. Overnight I noticed a lot of settling, I added a small bit of epsom salt, and what I guessed to be about 1-5% by weight of bentonite. It still settled a bit, but not so much that you couldn’t use it. The application of the glaze was dipping, with a bit of spraying to build a thicker layer of glaze on the top half of each piece.
It’s been pretty cool to watch Ceramic Materials Workshop develop into what it’s become. Matt and Rose Katz are building an amazing thing, and their list of glaze disciples pushing the envelope of glaze magic has grown steadily. I’d planned to become an initiate myself and take the October class… but life on a remote island in Southeast Alaska has it’s own demands on my time, attention, and energy. That said, I just got this info from CMW in my email, and it looks great – certainly in line with what Ceramic Action is all about. I’d encourage you to check it out, you can not go wrong. You can even use the code CMWRULES and get the whole shebang for 75$ (Less than the cost of my average bar tab)!!!
I never get tired of watching this video. The skill and rhythm in which this guy worked is something I’ve been chasing since I got into this game. Enjoy!
Some crazy good craftsmanship!
Credit Instagram @jewellhardwoods
Photo Credit: Instagram @dipanjan94
From the Artist:”Planet Iceland.
Braided rivers, black sand beach, and the Atlantic.
This was a particularly difficult shot. I scouted this location in Google Maps Satellite view, and we drove to its nearest place where a car can go. It was still very far.
After that, I flew the drone more than 3 km away in terrible winds to get this shot and a couple of others, and then immediately returned it back. Landed safely with 5% battery left.
An unbelievable shot from a super cool guy I was lucky enough to take out fly fishing this summer. Taken right out in my front yard so to speak.