Mass Red Earthenware Pottery Clay is workable, plastic and forgiving making it ideal for students and schools. It has great color and is good for wheel throwing and handbuilding.
Clay - Wikipedia
Red Terracotta Clay, Terracotta Clay
How To Harvest & Wet Process Your Own Natural Clay - Hobby Farms
Earthen Red Cone 06-5
A Step-by-Step Guide to Making Colored Clay - The Art of Education University
Sheffield Pottery– Artec
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Fabriano Mixed Media Bloc 250g/m2– Artec
Wild Clay Pottery: Tops Tips From Processing to Firing — Leela Pottery