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Raking light, the illumination of objects from a light source at an oblique angle or almost parallel to the surface, provides information on the surface topography and relief of the artefact thus lit. It is widely used in the examination of works of art.
The earliest known use of the noun raking light is in the 1850s. OED's earliest evidence for raking light is from 1857, in the writing of John Ruskin, art critic and social critic. raking light is formed within English, by compounding.
Jun 6, 2017 · A review in the international conservation literature reveals that raking light was already in use in museums in the 1930s, while during the 1960s it was a usual photographic technique (see e.g. Billiet 1932; Straub 1963). The interaction between directional light and matter can be furthered explained as an advanced perception of three ...
Bright light, usually beamed obliquely, used to reveal such things as surface texture and detail
Raking light with slight magnification is a simple yet highly effective method for examining the texture of parchment, helping to distinguish between the flesh side and the hair side. In parchment, the flesh side and the hair side are the two distinct surfaces created during the process of preparing animal skin for writing or artwork:…
The extreme angle of raking light reveals subtle changes in the shape of a surface, which may result from uneven stretching of a canvas, warping of a support, or cracks in paint or emulsion. It can also indicate how an artist applied or changed paint.
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Raking light refers to a lighting technique used in visual examinations that creates a shallow angle between the light source and the surface being observed.
