Paper Whiteness Tester - Technical Literature

Paper Whiteness Tester - Technical Literature Paper whiteness refers to the ability of paper to reflect after being exposed to light, expressed as a percentage
.

From a technical point of view, the degree of whiteness of paper and board includes a variety of complex factors, which are functions of the total spectral reflectance of the paper, the distribution of the lighting energy, the viewing conditions and the characteristics of the observer
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 In GB/T17749-1999 "Representation of Whiteness", the whiteness is defined as the degree to characterize the whiteness of an object.
The greater the whiteness value, the greater the whiteness
.

At present, there are many ways to express whiteness in various industries, but no matter which method is used to express whiteness, the evaluation result of whiteness should be consistent with human visual perception
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 The national standard GB8940.
1-88 stipulates that based on the blue light of D65 illuminant and 45/О lighting observation conditions, the whiteness of paper is a measure of the diffuse reflectance of 457nm blue light, and the whiteness reflects the brightness characteristics
.

Therefore, by detecting the brightness of the paper, the whiteness of the paper can be obtained, and the brightness and the whiteness have the same identity
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 For printing, the whiteness of the paper directly affects the color rendering effect of the product, and it is also one of the most concerned appearance properties in the paper properties
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The whiteness tester produced by Jinan Sanquan Zhongshi is an instrument that meets the national standard and is used to detect the whiteness of paper
.

 Technical parameters Zero drift≤0.
1; Indication drift≤0.
1; Indication error-error≤0.
5; Repeatability error-error≤0.
1; Specular reflection error-error≤0.
1; Weight 11Kg Working Temperature 15℃-40℃ Relative Humidity 85% Working Power 220V 50Hz Paper Whiteness Tester-Technical Literature