The effect on the bottom picture is by using a raku setup with a crackle white glaze that cracks by the rapid cooling before entering the reduction smoke chamber.
Ceramic pot making noise.
When the water reaches its boiling point bubbles start to form near the bottom of your pan because the bottom is closer to the heat source.
When you hear a pinging pot it typically isn t complete cause for alarm but instead it s a beginner s mistake that can happen.
Film youtube video etc.
If you do this it can actually make the pot explode so always be careful.
It s a rather chaotic process and usually loud.
I make sound fx for people to use in their projects.
That is the material had many defects in it s structure like the ones described in this wiki page and the heat from the water gave the structure enough energy to relax and heal them i ve witnessed a ceramic cup that started to make bell like noises when i poured myself a tea in it an.
The sound that s coming out of your pot is mostly due to boiling.
The odd thing is.
For more about firing glass with pottery visit combining glass with pottery.
The effect in the top picture was accomplished by melting and fusing glass on the pot.
I m not sure but it s possible that the ceramic material was relieving stress.
Every 15 mins to an hour they make a high pitched ping type of noise.
I am offering this service.
All of my uploads have a creative commons license.
I am new to wheel thrown pottery.