Glaze

In painting a glaze is a transparent layer of paint brushed over a dried underlayer. Generally associated with oil painting, glazes can also be applied on top of each other to create a feeling of depth and luminosity in the work, also protecting the paint and adding richness to the colour. In ceramics it is a glassy coating, either transparent or coloured, applied before firing to give a water-resistant, lustrous surface.

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Colley Cibber
attributed to Benjamin Rackstrow (or Rackstraw)
circa 1740
NPG 1045

Tom Cribb
by Unknown artist
circa 1810-1815
NPG 5812

Sir Henry Wylie Norman
by Unknown photographer
mid-late 1850s
NPG x21537

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