[130] See the essays by Natalia Ortega-Saez and Vincent Cattersel, by Art Gaibor Proaño and Chrystel Brandenburgh, by Jo Kirby, and by Paula Hohti Erichsen elsewhere in this volume; Pastoureau, Black: The History of a Colour, 78-104. On the laborious pre-modern art of black dyeing and the natural colorants used, see also, Hofenk de Graaff, The Colour of the Past, 285-324; Ploss, Ein Buch von alten Farben, esp. 63-64; Cardon, Le monde des teintures naturelles, esp. 397-465.