Alkalimanganat(V) als Farbkomponente in der blauen Danziger Waidasche* / Alkali Hvpomanganate as a Colouring Agent in the Blue Danzig Woad Ash

The blue Danzig woad ash was reproduced in an historical chemical experiment . As its colouring agent alkali hypomanganate could be identified. The portion of hvpomanganate formed depends on the alkali contents of the product, the heating time, and, especially, the heating temperature