doctor blade
a knife edge steel or plastic blade used to apply or remove ink from the cliché on a pad printing press.
doctoring edge (doctoring ring)
the sharp edge of the ink cup on a closed ink system on a pad printing press.
The bright areas and shadowed areas tend to blend together more easily than in hard light conditions. The transitions between sunlit and shadow tend to be gradual, rather than the knife edge effect often seen in hard light.
of a film's ability to record edge sharpness, particularly between differing tonal areas. Slow films do this better than fast films, producing more appprent sharpness in the image. Acutance is actually measured by photographing a knife edge.
 See also: Emulsion, Film, Image, Slide, Back
  
|
RSS
