Chrome tin red glazes between Seger cones 2 and 8
A 1914 ceramic-engineering thesis by Charles Louis Walduck at the University of Illinois, testing chrome-tin red glaze formulas fired between Seger cones 2 and 8, written for kiln chemists and glaze technicians. The plates are hand-lettered triangular composition diagrams with curved boundary lines and annotations naming results such as "blood red," "lilac with green," and "beaded and crawled," usable as ink-drawn chart forms, nested-triangle grids, and handwritten technical labels.
