A 1929 article by Dr. Nüsslein on Palatine Fast Colours, a class of dyestuffs that behave like chrome-developing dyes in fastness but are applied like acid dyes. It covers the history of colour fastness in wool dyeing, the dyeing method (sulphuric acid, no Glauber's salt), suitable end uses such as suitings, costume cloths, linings and hosiery yarns, and limitations such as milling fastness and cost. A plate of eight dyed swatches lists the dye recipes used.