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Dr. Box cardboard box: quantitative and thickness of cardboard [original 2,014,123 21:04:01] box cardboard boxzkb8 Dr. accordance with GB / T 450 - 2008 take paper and cardboard specimen "and the vertical and horizontal sample, positive and negative determination "requirement for sampling. This standard is equivalent to ISO 186 "Paper and board a measured average mass of the sample taken." The principle is that a number of paper or paperboard from a random sample of several packaging units, from the packaging unit randomly selected number of sheets. Then the selected sheet dispensing, cutting form sample, the average composition of the sample sample mixed, and then extract the sample meet the test requirements from an average sample. Sampling, remove all paper layer damaged from the outside of each of the selected web after quantitative if not more than 225g / m on and then remove the three undamaged, if quantitative than 225g / m will be removed undamaged layer, then cut along the whole banner roll knife, its depth should be able to meet the required number of sheets of sampling, routine testing is generally not less than six samples (sample length of full-size, width 400mm roll). 

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