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release time：2018-01-09 hits：
Watch gift bag manufacturers tell you what the value of "D65"
Watch gift bag manufacturers have done research on the regulations of many countries, and some of the country's research on the requirements of paper standards is particularly profound, which makes the packaging factory are very anxious, because when the introduction of the provisions of many manufacturers are a bit at a loss , But with the implementation of the regulations, watch gift bag manufacturers with their own quality and high standards of paper on the introduction of the "D65" paper whiteness standards made an interpretation of today, Junye packaging to share with you about Reference standards under this standard criteria bar.
Watch gift bag manufacturers in the earliest time the new standards are not actually introduced, but in response to government regulations, and gradually adjust their own penetration of the new rules, and slowly have some of their own unique insights, and now our country's The standard is GB / T 7974-2002 "Determination of brightness (whiteness) of paper, board and pulp (diffuse vertical method)", the test reference to the provisions of the brightness of the law.
The watch gift bag manufacturer found a blue light internal reflection factor for the dominant wavelength (457 ± 0.5) nm of the sample of the paper at the simulated D65 light source of the reflectometer under the standard conditions set forth in GB / T7973. The resulting value is what we now call the whiteness of one of the numerical representation, watch gift bag manufacturers that this is ISO 2470: 1999 standard called D65 brightness called.
If the "D65" whiteness that there is anything you do not understand can call the watch gift bag manufacturers online customer service hotline: +8613826291162, and Junye packing e-mail: firstname.lastname@example.org can leave a message, Chun Yip packaging will reply you as soon as possible.
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