Die Schmalte-Fabrikazion und das Safflormachen aus Kobold
A German technical book of 1820 by Maximilian Gottlieb Mayer, published in Frankfurt am Main by Jäger, describing how smalt (a blue cobalt glass pigment) and safflower dye were produced from cobalt ore for craftsmen and manufacturers. The plates are measured architectural cross-sections, plans and elevations of furnaces, kilns and roasting ovens, drawn in fine black line with lettered reference marks and hatched masonry. A designer might borrow their clean diagrammatic style, the dense grid of labelled plates, and the stone and brick hatching patterns.
