Conclusions
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1.
When one coordinate ¯z (pulp and purely pulp paper) is sufficient for characterization of whiteness, the Zeiss leukometer gives reliable results and can be used successfully for evaluating whiteness.
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2.
Measurement of coordinate ¯y on the leukometer is possible only after installing the combined filter proposed in this article into the instrument.
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3.
Certification of leukometer standards should be done by measuring the spectrophotometric curves and subsequent calculation of the zonal reflection coefficients, or by means of a checked leukometer.
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Literature cited
E. N. Yustova, N. I. Kaminskaya, and G. V. Pokrovskaya, Izmeritel'. Tekh., No. 1 (1968).
Additional information
Translated from Izmeritel'naya Tekhnika, No. 2, pp. 61–62, February, 1970.
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Kaminskaya, N.I., Kuritskii, A.L., Panova, I.N. et al. Use of a zeiss leukometer for measuring the whiteness of paper. Meas Tech 13, 254–256 (1970). https://doi.org/10.1007/BF00982977
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DOI: https://doi.org/10.1007/BF00982977