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      The GB/T 7975-2005 standard specifies a method for the determination of paper and Cardboard Color by diffuse reflection, suitable for samples without fluorescent dyestuff or pigment. This method eliminates the influence of Gloss, improves the accuracy of measurement by extinction treatment, and is suitable for Color evaluation of paper and Cardboard containing fluorescent whitening agents.

      This summary is not the original standard text and is for reference only. For accurate information, please obtain it through official channels.
      Status Active
      CCS Y30 ICS 85.060
      Release Date 2005-09-26 00:00:00 Implementation Date 2006-04-01 00:00:00
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      CHNSPEC ColorSpec CS-520 Portable Colorimeter Camera Frame UV Switching
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      CHNSPEC CS-820N Colorimeter 4 calibers, measurable fluorescence, support SCI + SCE cost performance
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      3NH YS6060 Benchtop Colorimeter 400nm + 420nm Cut-off Light source
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      3NH YS6010 Benchtop Colorimeter 400nm Cut-off Light source
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