A short 1798 report of experiments comparing magnesia, calcareous earth (lime) and alum, each dissolved in sulphuric, nitric and muriatic acids, as mordants for dyeing wool, silk, linen and cotton with madder. Wool and silk took a brown color and linen and cotton a pale red. The author found alum gave brighter, finer colors than the other earths, so it should be preferred. He also suggests testing barytes and manganese, which he could not try.

An 1798 article from The Repertory of Arts and Manufactures, translated from Crell's Chemical Annals, in which Mr. Vogler of Weilburg describes a five-step process for dyeing linen and cotton a deep, lasting black. The steps are a mordant of litharge dissolved in nitric acid (aquafortis) followed by a glue-water dip, a gall decoction with salt, a copperas (iron vitriol) bath, a logwood and starch decoction, and a final fixing bath of galls, glue-water and copperas. It also gives substitutes for galls, notes on preparing yarn and skeins, and advice on vessels.