A Pattern Bar is a glass rod or bar that has an internal design, much like a jelly roll, that can be viewed when sliced. During this fast paced Webinar, Gil will show you the ancient technique of pattern bars and his signature variation, the Flow Bar. You will learn all you need to know to make exciting Flow Bars from basic set up to firing schedules.

https://www.glasspatterns.com/en/glass-patterns-quarterly-store/category/208-live-webinar-events.html?page=1