vbl. sb. [f. VIGNETTE v.] The action or process of producing vignettes, esp. in photography.
1885. Pall Mall G., 7 May, 11/2. The vignetting is, without doubt, the most difficult form of printing.
1889. Anthonys Photogr. Bull., II. 227. Generally, unless vignetting is desired, the background may be made of hangings of some rough material, absorbent of light.
b. attrib., as vignetting glass, mask, table, etc.
1889. Anthonys Photogr. Bull., II. 261. For quarter-plates and half-plates, the vignetting mask should be about three-quarters of an inch from the negative.
1892. Photogr. Ann., II. p. clxxix. Vignetting Glasses. Ibid., 486. Revolving Vignetting Table.