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A dry paint film contains 30 cubic centimetres of pigment and 70 of binder. What is its pigment volume concentration?

  • A.23 per cent
  • B.30 per cent
  • C.43 per cent
  • D.70 per cent

Answer: B

Thirty of the hundred cubic centimetres of solids is pigment, so the concentration is thirty per cent. That is a typical figure for a gloss paint, well below the critical value. Matt paints run well above the critical figure.

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