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Consider the following statements about Kubelka Munk theory.
1. K over S is approximately additive across colourants.
2. Reflectance itself is not additive in concentration.
3. The theory applies without modification to transparent media.

  • A.1 only
  • B.All of them
  • C.1 and 2 only
  • D.3 only

Answer: C

The first two are correct and are the basis of recipe prediction. The third is not so, since the two constant theory assumes an opaque scattering medium. Transparent media need a different treatment. Two constant theory assumes scattering.

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