Pottery Shorts: What Happens to Clay in a Firing?

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Welcome to Pottery Shorts, brought to you by The Potter’s Round Table, the topic for this episode is What Happens to Clay in a Firing?
If you have fired any pottery in the past, you will know that when we fire, the clay gets stronger and easier to handle. When we fire clay to the rated cone, the clay vitrifies and becomes a stone-like ceramic material. This Pottery Short episode will explore what happens from a scientific perspective. Phil gives an easy-to-understand explanation of how the clay changes in a firing. Enjoy the show.
The Potters’ Round Table is brought to you by Washington Street Studios, a community pottery studio, gallery, and pottery school located in Harpers Ferry / Bolivar, WV. We exist to provide ceramic artists an affordable, fully equipped studio space for aspiring, emerging and established artists to share their creative energy and knowledge in an environment designed to support the ceramic artist. If you want to learn more about Washington Street Studios, visit our website at www.hfclay.com/.
At Washington Street Studios, we believe the sharing of creative energy and knowledge will improve the quality of our art and increase the appreciation of art within our community. We are striving to create an environment where the arts are shared and appreciated. We want to grow as a family of artists and contribute to our community.
This video is one of our steps to share our passion for the ceramic arts, creative energy and knowledge with other artists and art lovers. We also created an audio version to expand our audience. If you are looking for the podcast of our show search for the ‘The Potters Round Table’ on your podcast platform of choice or go to anchor.fm/thepottersroundtable.

Опубликовано:

26 апр 2021

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Комментарии : 35

@lisalovelylpa 2 года назад

So in general , it can be a very creative medium , if you are building a kiln for the first time , the message I get is take it slow and get as close to the desired temp as you can , and their could be a lot of variability in the end materials produced. Kinda exciting. As long as the whole thing does not blow up or melt and fall over lol Thanks again. I am trying to portion a few dollars for your patreon as your videos have been very helpful in my work.

@WashingtonStreetStudios 2 года назад

Lisa Lovely LPA Thank you for any support you can give, but please don't feel obligated, we are happy that you are finding a benefit from the videos! Phil used to say that working with ceramics is like walking on the edge of a cliff, you can go for years without an issue, no falling, no problem. Then one day, while walking the same path, something gives way and down you go! It can be a chemical mined from a different area of the mine, a burst of heat, or a fault in the clay, and you don't know what happened. So yes, take it easy and slow, and take a lot of notes! Thanks for watching and please share the channel with your friends and fellow potters to help us grow our community!

@stanislawsmykowski5850 Год назад

Great Video! I was courious what hapenns with a clay during firing and this is the best answer which I found. Greetings from Poland :D

@WashingtonStreetStudios Год назад

Thank you for your encouragement! I hope you enjoy all the videos.

@credenza1 3 года назад

Great information.

@WashingtonStreetStudios 3 года назад

credenza, Thanks, please share with your friends and fellow potters!

@robhumphreys4642 3 месяца назад

Awesome information. Very well presented.

@WashingtonStreetStudios 2 месяца назад

Glad it was helpful!

@michaeldausmann6066 3 года назад

Great info. I'll just need some time to mullite it over.

@WashingtonStreetStudios 3 года назад

Michael, now that's funny!

@blaidd5917 2 года назад

This was probably the most interesting video if seen all week. Never would've guessed heating up dirt was this complex!

@WashingtonStreetStudios 2 года назад

Phil did a great job of presenting the complex side of seemingly simple things in a way that made it understandable! Keep watching and enjoy the channel.

@boredwools2158 Год назад

omg it took me too long to realize why there were a pair of shorts in the thumbnail hahahaha!

@WashingtonStreetStudios Год назад

Videos made on the fly!

@Sheepdog1314 3 года назад

thank you so much -- I am a beginner, still struggling with EVERYTHING...can you make a video about primitive firing? Great information....

@WashingtonStreetStudios 3 года назад

We have a plan to do a video on pit firing or sawdust firing in the near future. That's about the most primitive we get! I will look for someone who does primitive firing and see if they would like to talk on it.

@tokiidokiie 3 года назад

Loving these videos, learning so much. Really appreciate the clarity of the information.

@WashingtonStreetStudios 3 года назад

tokiidokiie, please share the channel with your friends and fellow potters! And thank you for the encouragement.

@jenniehenriksson3267 3 года назад

I'm interested in what's happening when we refiring a piece. I've heard that it is a critical process that may be break a piece. Interesting to hear why. Thanks for many good videos. /Sweden

@WashingtonStreetStudios 3 года назад

Jennie, Thank you for your question! I've forwarded the question to Phil and will post his response when I receive it. Thank you for making our channel international and please share the channel with your friends and fellow potters!

@WashingtonStreetStudios 3 года назад

Hi Jennie, Thanks for your email and your question. Once a piece has been high-fired to stoneware temperatures and the clay has become dense and hard, it is no longer as thermally shock resistant as it was before firing, so rapid and especially uneven heating can cause uneven expansion and cracking. Also, if the dense, fired piece still contains a lot of quartz, or cristobalite formed in the high-firing, rapid heating through the silica inversion temperatures, and the resulting rapid expansion, can cause the piece to shatter. Earthenware pottery, which does not vitrify and become dense during the glaze firing, is not as temperature sensitive when refired. Phil

@jenniehenriksson3267 3 года назад

@@WashingtonStreetStudios Thank you Phil for your answer and once again Thank you for all the interesting and informative videos.

@sallyweiner4180 3 года назад

Chemistry is not my strong suite but I can understand this! Thank you for making it so clear

@WashingtonStreetStudios 3 года назад

Sally, we are happy you found the lecture useful, please share the channel with your friends and fellow potters to help us grow our community.

@pooiabeik3042 3 года назад

Thank you so much for another amazing lesson! Really excellent indeed~

@WashingtonStreetStudios 3 года назад

You are most welcome Pooia, thank you for watching and for your encouragement!

@actsnfacts 3 года назад

Great info, crystal clear explanations, as always. Here's a suggestion for a topic that might be of interest for the begginers and the pros just as much: pitcher and teapot spouts and their fluid dynamics! how to make pitchers and teapots that don't drip on your table when you are proudly pouring from your own hand-made piece of work 😆

@WashingtonStreetStudios 3 года назад

Thanks for the suggestion, we'll add it to the list of future topics! And thank you for watching our videos and being part of our community!

@freddiemoretti8456 3 года назад

Thanks again! 1) I have been shutting the the peep hole in my wee test kiln(Paragon Q-11A) when the temp reaches 1750F + thinking that all the organic burn off should be done by then and I might be saving some heat build up. Am I mistaken, and would the burn off be the same for stoneware with or without grog? 2) Would it be any benefit to make a wee bung for the hole instead of using the swivel metal cap the kiln comes with? I have successfully watched all of the Washington Street videos and now have a much better understanding of just how much I don't know. The education has been very valuable and I look forward to more videos in the future. Cheers and be well...Freddie

@WashingtonStreetStudios 3 года назад

Thank you Freddie! I've forwarded your questions to Phil and I will post his reply.

@freddiemoretti8456 3 года назад

@@WashingtonStreetStudios TA!

@marianandtomyancey1313 3 года назад

The videos cut off after about two items on the list. Is this on purpose,? Is there some where to see all the list items addressed?

@WashingtonStreetStudios 3 года назад

Actually all the items are covered. Introduction runs until about 2:20 Drying starts around 2:20 Decomposition starts at 3:30ish Re-forming starts at 5:40ish Sintering starts around 7:00 and Crystallization or cooling starts at 8:00. I hope this helps, I really should add chapters!