Nature Printing

Pulse, the Linnean Society’s newsletter 34, June 2017, has an article entitled Lampblack and Lead,  by E. Rollinson.

220px-Nature_print_(Bradbury).jpg     Nature_print,_Alois_Auer.jpg(H. Bradbury, 1843, 1859)

It tells how G. Cardano gave instructions back in 1550: ‘A fresh leaf is rubbed with verdigris and carbon; soaked in the right amount of colour it is printed on one of two large sheets of paper, so that an almost life-like image remains.’ (De Subtitilitate, Book XIII). Earlier, a physician named Conrad von Butzbach, in his 1425 Codex Auratus, coated paper with oil and used soot from a candle flame to make an impression of a plant specimen.