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Scratchboard or scraperboard or scratch art [1] is a form of direct engraving where the artist scratches off dark ink to reveal a white or colored layer beneath. The technique uses sharp knives and tools for engraving into the scratchboard, which is usually cardboard covered in a thin layer of white China clay coated with black India ink .
One can also artificially limit the range of color in a photo to those within a certain hue by using black-and-white film or paper, or by manipulating color images using computer software. Color images can be converted to black and white on the computer using several methods, including desaturating the existing color RGB image so that no color ...
The Brazilian writer Olavo de Carvalho reproduced the engraving in his 1995 book O Jardim das Aflições ("The Garden of Afflictions"), offering it as an example of Renaissance views concerning the spiritual world, which he criticized: "the pilgrim evades the mundane 'sphere', abandoning trees and flowers, Sun and Moon, birds and stars, to ...
"After the color image is established, the black silver-based image is dissolved away, leaving the color behind." #28 The Cathedral, Amsterdam, Holland Image credits: Detroit Photograph Company
Wood panel slats will also off-gas causing further degradation of the photographs. Simple conservation of these fragile materials can be carried out by the adventurous amateur. A hand-coloured photograph should be removed from the frame, retaining any original screws or nails holding the frame together.
Though not, as frequently asserted, the inventor of wood-engraving, he was the first to recognise that, as the incisions made by the graver on the wood block printed white, the right use of the medium was to base his designs as much as possible on white lines and areas, and so he became the first to use his graver as a drawing instrument and to ...
The plot thickened when Kaechele admitted that she had forged the three works herself because she wanted them to match the original space’s color scheme and green silk curtains.
Black-and-white infrared negative films are sensitive to wavelengths in the 700 to 900 nm near infrared spectrum, and most also have an inherent sensitivity to blue light wavelengths. [ 27 ] : 37–38 Kodak High-Speed Infrared (HIE), which produced negatives for photographic prints, was one of the most common black-and-white infrared films used.
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