Special Colouring or Colour Toning
Toning is a method of changing the colour of black-and-white photographs to give a unique look to the photograph.Ordinary photos can be given a whole new look by having them coloured with special tints.It was common in the early days of photography for pictures to be brown, blue, or silver instead of plain black and white. Sepia toning, which gave a warm reddish-brown color, was the most common, and the one we tend to associate with most old-time photos.
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