What's the history behind Orton cones' unusual numbering system?

Today's episode starts with a trip to Materials Corner where the gang talk about the likely end of a favorite Kaolin for soda firing. They also answer listener questions about the logic behind Orton cone's numbering system, the cause of scumming in clay, and the lowest temperature that it's ok to store clay. Do you have questions or need advice on glazes? Drop us a line at [email protected] and you could be featured on an upcoming show.   Have you checked out the new For Flux Sake Patreon? This is a great way to show your support and have access to discounted merch, live hangouts, and extra episodes. Head over to Patreon and sign up today.    Today's episode is brought to you by Monkey Stuff, The Rosenfield Collection, Cornell Studio Supply, and Ceramic Materials Workshop's Making Glaze Make Sense.   This week's episode features the following topics: Materials Corner, Helmar Kaolin, Orton cones, scumming, winterizing your studio