I think what’s going on here is getting a little lost as you’ve focussed a lot of firing temp and haven’t talked about clay body: the difference is in the clay not the firing temperature. The firing temperature for each clay body is the temperature required to reach vitrification. If you overheat earthenware clay it will just entirely melt. So, the different firing temperature is as a result of the clay having different properties. You are correct when you describe the properties of porcelain as being much tighter etc… but that is a property of the clay body and why it has a higher vitrification temp. The temp itself isn’t making it stronger. You’re also correct that earthenware doesn’t fully vitrify. being glazed or unglazed isn’t way to tell stoneware and earthenware pieces apart… In fact I’d be surprised if your example of earthenware isn’t stoneware. My reasoning is that it has a crackle glaze and this is often seen in Raku glazed pieces (a Japanese glazing technique that makes use of an open flame) Raku is too hot for earthenware to survive - so that’s probably stoneware.
Hey Lockey! I think you're right the framing of ESP around firing temperature isn't the best way to talk about these differences. I may do an update or part 2 in the future. Exactly, great way of reframing. The temperature is the effect of the ability of the clay (melting example) not visa versa. Raku is definitely much too volatile to be fired at earthenware temp, but this is simply a glaze making the cracking effect not an atmospherically fired piece.
I really love the look of the unglazed porcelain.
This channel is so underrated, what a beautiful explanation
Wow, thank you!
I love that first earthenware cup. I dig the cracked look.
It must have a secondary lacquer on, as cracked glazes aren’t generally considered food safe.
Great video! You also brought back memories of Jingdezhen from my university period.
I think what’s going on here is getting a little lost as you’ve focussed a lot of firing temp and haven’t talked about clay body: the difference is in the clay not the firing temperature. The firing temperature for each clay body is the temperature required to reach vitrification. If you overheat earthenware clay it will just entirely melt. So, the different firing temperature is as a result of the clay having different properties.
You are correct when you describe the properties of porcelain as being much tighter etc… but that is a property of the clay body and why it has a higher vitrification temp. The temp itself isn’t making it stronger.
You’re also correct that earthenware doesn’t fully vitrify.
being glazed or unglazed isn’t way to tell stoneware and earthenware pieces apart…
In fact I’d be surprised if your example of earthenware isn’t stoneware. My reasoning is that it has a crackle glaze and this is often seen in Raku glazed pieces (a Japanese glazing technique that makes use of an open flame) Raku is too hot for earthenware to survive - so that’s probably stoneware.
Hey Lockey!
I think you're right the framing of ESP around firing temperature isn't the best way to talk about these differences. I may do an update or part 2 in the future.
Exactly, great way of reframing. The temperature is the effect of the ability of the clay (melting example) not visa versa.
Raku is definitely much too volatile to be fired at earthenware temp, but this is simply a glaze making the cracking effect not an atmospherically fired piece.
Man I love this channel, thanks so much
You’re so welcome 💜
Bro, those four cities, you mind pasting the Chinese words?
宜兴，潮州， 钦州， 建水
Yixing, Chaozhou, Qinzhou, Jianshui