Blueprint
from Fancyclopedia 2 ca. 1959
Reproduction by a sort of simplified photography, without the fine detail or graduations of shade. Blueprint paper is exposed to light with material on a translucent sheet placed over it like a negative; the light turns it blue in all areas not shaded. A bath in water then destroys the paper's ability to change any further. It isn't easy, but some handsome pieces of fan art have been produced thus.
from Fancyclopedia 1 ca. 1944
Reproduction by simplified fotografy, without the fine detail or gradations of shade. Blueprint paper is exposed to the sun with writing on a translucent sheet placed over it, and the lite turns all blue but the lines and areas which have been shaded. Washing in water then destroys the property of the paper to change any further. 'Taint easy.