BS-4432 (Part 4) - 1980/ISO 3688 - 1977; Methods for determining optical properties of pulp, paper and board Part 4 measurement of diffuse blue reflectance factors (ISO brightness) of pulps

BS-4432 (Part 4) - 1980/ISO 3688 - 1977; Methods for determining optical properties of pulp, paper and board Part 4 measurement of diffuse blue reflectance factors (ISO brightness) of pulps - London BSI 1980 - 5p

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