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Assertion (A): Specular included measurement is preferred for colourant formulation.
Reason (R): It reduces the influence of surface finish on the reading obtained.

  • A.Both A and R are true, and R is the correct explanation of A
  • B.Both A and R are true, but R is not the correct explanation of A
  • C.A is true but R is false
  • D.A is false but R is true

Answer: A

Correct answer: Both A and R are true, and R is the correct explanation of A

Both are true and the reason gives the argument. A formulator is concerned with the colourant, not with the finish that happens to be on this particular sample, and the specular included measurement largely removes the effect of surface texture and gloss. The specular excluded measurement is preferred for appearance work, where that effect is precisely what matters.

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