Have you ever found a bucket of material and not known what it is? On today’s episode of For Flux Sake our hosts talk about how you might test that mystery material so that you can put it to good use. They also answer a listener question about adding colorants to commercial glazes. For supplemental info, visit the blog at www.ceramicmaterialsworkshop.com/cmw-blog.    Today’s episode is brought to you by the following sponsors: For the past 100 years, AMACO Brent has been creating ceramic supplies for our community ranging from underglazes to electric kilns, and they have no plans of slowing down. www.amaco.com   The Rosenfield Collection of Functional Ceramic Art is an online source for research and inspiration, featuring images of thousands of objects made by over 800 artists. The images are high quality and can be used with no permission required, making them a great resource for students and teachers. www.Rosenfieldcollection.com.