This week on the show we have a great slate of questions from our listeners. Kathy, Matt, and Rose talk about the effect of Terra Siggilata on absorption, flashing caused by soluble materials, and best practices for safely using luster. If you have a ceramic chemistry problem you’d like help with, send us a voice memo with your question to [email protected]. To see the supplemental info we talked about in this episode, visit Ceramic Materials Workshop.   Hello For Flux Sake Listeners! As you know, Matt and Rose do a lot of glaze testing… A lot. They’ve decided to share some of that testing in their amazing new digital glaze book Test Test Test!:7500 glaze tests from Ceramic Materials Workshop. The book features a broad spectrum of oxidation and reduction glazes including matte, gloss, and crystalline, half of which are at Cone 10 and the other half at Cone 6. Each glaze is documented with images, recipes, and chemistry giving you an opportunity to learn these glazes inside and out. Check it out and don’t forget to keep on test, test, testing! To purchase visit www.ceramicmaterialsworkshop.com.   Today’s episode is brought to you by:   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 900 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.