I washed dyes extracted from the juice of blackberries onto paper boards. The brighter hue is made from pure blackberry and is very fugitive. In a few moths it will fade to a pale washed out blue. The darker colour was created with the addition of lye, which according to the seventeenth century botanist Culpepper made a permanent black for colouring the hair. I enjoy the reciprocity between their relative warmth and degree of transience.