Robinson, H. P. (Henry Peach), 1830-1901, author, Abney, William de Wiveleslie, Sir, 1843-1920, author, Piper & Carter, publisher · London : Piper & Carter · leaf 79
67 VIGNETTING. cut out the shaded pieces at the corners. Now bend the card along the cuts, and a raised block will result of this shape. The … comers are held together by pieces of gummed or albumenized paper, and the block is ready for an aperture to he cut in it according to the portrait to he printed. Wooden grooves may he glued along the top of the vignetting frame, into which cards containing other apertures can he slipped.*' The…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
