[79] This is recorded in The Göttingen Model Book’, c. 1450, Niedersächsische Staats- und Universitätsbibliothek Göttingen, MS. Uffenb. 51, fol. 6r. The internet-transcription reads ‘kyn swarz’ (Kienschwarz), for ‘pine soot black’. However, paleographically it is more likely that it means ‘byn swarz’ (Beinschwarz) or ‘bone black’: https://www.gutenbergdigital.de/gudi/dframes/texte/frameset/indxmubu.htm.