44a. William Blake, The First Book of Urizen copy D, plate 1. Relief etching, 14.9 x 10.3 cm., etched 1794, color printed and finished in watercolors 1794. British Museum. Detail showing that ink mixes with or shows through colors printed on top of it, but is covered by colors brushed over it on the impression. Printed colors are reticulated, but colors applied to the impression, like the gray between the tablets and above the figure's head, are flatter and smoother and have more opacity.