E15 Pottery Shorts Glazes and Disappearing Colors
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Күн бұрынWelcome to Pottery Shorts, brought to you by The Potter’s Round Table, the topic for this episode is Glazes and Disappearing Colors.
Have you ever mixed your own glaze, expecting one color, and you find the color has disappeared or turned into a color that was a surprise? In this episode Phil discusses why we get some unexpected results and why some colors just disappear. 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.
@freddiemoretti8456 3 жыл бұрын
Informative short short. Ta!
@WashingtonStreetStudios 3 жыл бұрын
Thanks Freddie! Finally a real short. Well, if you think over seven minutes is a short.....
@dianeuranowski3694 3 жыл бұрын
Very interesting !
@WashingtonStreetStudios 3 жыл бұрын
Diane, we are glad you enjoyed it, please share the channel with your friends and fellow potters to help us grow our community.
@emblemcc 3 жыл бұрын
sure, super informative as always
@WashingtonStreetStudios 3 жыл бұрын
Jan 20406, Thanks for the support, please share the channel with your friends and fellow potters to help us grow our community!
@xm3364 Жыл бұрын
Thank you for the chemistry explanation and very interesting! Will do some test tiles :-)
@WashingtonStreetStudios Жыл бұрын
XM, Good luck and let us know your results!
@xm3364 Жыл бұрын
@@WashingtonStreetStudios Found out Chromium oxide is highly toxic. Is it safe to be used for kitchen ware?
@WashingtonStreetStudios Жыл бұрын
Chromium oxide is toxic when inhaled or ingested. When used in a properly formulated glaze, it is food safe. The to
@WashingtonStreetStudios Жыл бұрын
The material is encapsulated in the ceramic material and is no longer an inhalation or ingestion risk.
@xm3364 Жыл бұрын
@@WashingtonStreetStudios Thank you for the assurance. :-)
@katekaniff5987 3 жыл бұрын
Phil... you are a font of knowledge! I’m glazing now ... all your information perks thought & answers a plethora of questions I didn’t know I had! Thank you(:
@WashingtonStreetStudios 3 жыл бұрын
Kate, Thank you and if any of your questions could be topics for future videos, please let us know! If you are thinking of the question, many will appreciated an answer! Thank you for your continued support and encouragement.
@mosseyw 3 жыл бұрын
More great information to add to my knowledge bank , thanks again for these videos 👍
@WashingtonStreetStudios 3 жыл бұрын
Mosseyw, thanks for the comment and the support!
@redharrier8273 3 жыл бұрын
Thank you for this explanation! I have learnt a lot from this channel. Do you have any thoughts on single firing? It would be great to learn more about that in a video. I have been told that single firing makes the ware stronger - is that true? If so, why? Thanks.
@WashingtonStreetStudios 3 жыл бұрын
Red, Thank you for the topic suggestion, I have forwarded it to Phil, along with your questions! I will post his response when I recieve it.
@WashingtonStreetStudios 3 жыл бұрын
Hi Red, Thanks for your email. Single firing is a traditional technique that basically combines a bisque firing and a glaze firing into one firing. I can’t imagine why single firing would produce stronger pots, if the pots are fired at the same schedule to the same final high temperature. The sintering and densification that occur at the high temperatures are what give the pots their final fired strength. I personally don’t favor single firing for my work because, except for not having to perform a separate firing, I don’t see any great advantage. It is still necessary to include a slow, bisque-firing portion at the beginning of the firing. With a separate bisque firing there is the opportunity to examine pots for defects before glazing, and the bisqued pots are more easily handled for glazing, allowing more variation in glaze application techniques. Varying the bisque firing temperature can also provide the opportunity to explore different glaze absorption rates and final thicknesses. Phil
@michaeldausmann6066 3 жыл бұрын
I have never heard this explained or read about it. Fantastic!.. so a 'tomato' red glaze with 11% red iron oxide e.g. glazy.org/recipes/29031 .... is the red from the red iron oxide in suspension or from the bone ash?... I fire this in reduction and it is still red
@WashingtonStreetStudios 3 жыл бұрын
Hi Michael, Thanks for your email. The red color, and the opaque nature of the glaze, would be from the iron oxide in suspension. I’m not sure exactly what role the bone ash (calcium phosphate) plays, but it apparently intensifies the red color. My guess would be that the bone ash helps to stabilize the iron oxide in the red (ferric) state. Under normal conditions, when heated to stoneware temperatures, and in reduction, the red iron oxide would change into black iron oxide, and the red color would be darkened or mostly lost. Phil
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