Can I add something to a commercial glaze to change its temperature?

To start today's episode the gang talk about their upcoming live show in Boston. We hope you will join us June 5th at the Harvard Ed Portal, where Kathy, Matt, Rose, and Producer Ben will be ready to answer your burning questions about clay and glaze. They also answer listener questions about what to do when all your glazes mature at a different temperature, and how to identify a mystery white spot in the surface of your fired glaze.   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 Rhode Kilns, 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: Live show, glaze temperature, Cone 5, Cone 5 ½, Cone 6, crystal formation