“Item to make soot-black. Take a thick wick from coarse ropes like a swan feather, and pinch resin around it like a candle and put it under a basin that has been very neatly scrubbed, overturned on 3 half bricks; and if you want to have the whole thing [vole = complete?], you can place iiij pieces of resin on a jug or a latel [?] pan around the candle and let it fully burn, and then sweep it off the basin and grind it with water as long as Rubrijk. And put it on chalk and let it dry and put it in a box.” In: Kölner Musterbuch. 1490. Köln, Historisches Archiv der Stadt, Best. 7010 (Wallraf) 293: fol. 7r.