白度仪 白度测定仪 用于测定物体白度 测定纸张的不透明度

白度测定仪，用于测定物体的白度，它广泛应用于造纸、纺织、印染、塑料、陶瓷、搪瓷、粮食、建材、油漆、化工、盐和其他需要测定特体白度的生产和商检部门。仪器还可以测定纸张的透明度、不透明度、光散射系数和吸收系数。
本仪器符合GB3978-83：标准照明体和照明观测条件。模拟D65照明体照明。采用d/o照明观测几何条件（ISO2469），漫射球直径φ150mm，测试孔直径有φ30mm和φ19mm两种，设有光吸收器，消除了试样镜面反射光的影响。R457白度光学系统的光谱功率分布的峰值波长457nm，半高宽44nm；RY光学系统符合GB3979-83：物体色测量方法。

主 要 性 能 特 点
1. 测定ISO白度（ISO Brightness，即R457白度），对荧光增白的试样，还可以测定其中荧光物质发射产生的荧光增白度。
2. 测定明度刺激值Y10。
3. 测定不透明度（OPACity）。
4. 测定透明度。
5. 测定光散射系数和吸收系数。
6. 可以多次测定并给出一系列测定结果的算术平均值。
7. 带断电保护，调零、调准和标准量值等数据，即使长期失电，亦保护数据不丢失。

主 要 技 术 参 数
1. 测定并数字显示白度，荧光（增白）白度，不透明度（%）等；
2. 零点漂移：≤0.1；
3. 示值漂移：≤0.1；
4. 示值误差：≤0.5；
5. 重复性误差：≤0.1；
6. 镜面反射误差：≤0.1；
7. 试样尺寸：测试平面不小于φ30mm或φ19mm，试样厚度不超过40mm.
8. 电源：～220V±10%，50Hz，0.3A；
9. 工作环境：温度0～40℃，相对湿度不超过85%；

48B BRIGHTNESS TESTER
INTRODUCTION
The instrument is mainly used to test the whiteness of diversified objects such as paper and board, pulps and chemical fiber, textile, plastic, ceramic
, enamel, fecula, salt, white cerement, porcelain clay and French chalk, etc. It can also be used to test the optical performance of sheet materials, for example, opacit
y test.

APPLICATIONS
Paper, Board, Pulps, Chemical fiber, Textile, Plastic, Ceramic, Enamel, Fecula, Salt, White cerement, Porcelain clay and French chalk etc.

STANDARDS
Meets ISO 2469, ISO 2470, ISO 2471, GB/T 7933, GB/T7974, GB/T 8940.2, GB/T 1840, GB/T 2913, GB/T 13025.2,GB/T 1543, ISO 2471, GB/T 10339, GB/T 5950 Etc.

SPECIFICATIONS
1. This instrument complies with GB3978-83; Standard illuminator and illuminating--viewing
conditions.
2. Simulate D65 illuminator to illuminate. Adopt d/o illuminating--viewing geometrical coanditions. Diameter of the diffusion sphere is 150mm and diameter of the testing hole is 25mm.
3. Light absorber is provided to eliminate the effect of specular reflection. Peak wavelength of spectral power distribution of R457 whiteness optical system is 457nm and its half-width is 44nm.
4. Measure and display the whiteness, Fluorescent whiteness (whitening rate) and opacity (%) etc. digitally.
5. Indication error: 0.5%
6. Sample size: Test plate diameter should not be less than 30mm while sample thickness should not exceed 40mm.
7. Power supply: 160V-260V, 50Hz, 0.3A
8. Measure time: 3s
9. Working condition:Temp.0-40oC, relative humidity ＜85％.
10. Size and weight: L×W×H＝365×260×425mm, 11kg

FEATURES
1. Measure the Blue Reflectance Factor (R457) of samples. Blue Reflectance Factor is so called “Blue Whiteness” or “ISO Brightness”.
2. Analyze the sample to find out whether it contains any fluorescent brightener. If so, measure the fluorescent whiteness further, namely whitening rate.
3. Measure the opacity, transparency, light scattering coefficient and light absorbing coefficient.

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