YQ-Z-48B Whiteness Meter

Detailed Product Description

1.  Application

 

The instrument is used for measuring whiteness of objects. It is widely used in papermaking, textile, printing and dyeing, plastics, ceramics, enamel, food, building materials, paints, chemicals, salt and other production and inspection departments which measure whiteness. It also can Measure ISO Brightness (R457), fluorescent whitening degree and transparency, opacity, light scattering coefficient and absorption coefficient. of paper and other tissue materials.

 

2.  Executive standards

 

GB/T 3978: Standard illuminants and geometry conditions

GB/T 7973: Paper, board and pulps - Measurement of diffuse reflectance factor (d/o)

GB/T 7974: Paper, board and pulps - Measurement of brightness (d/o)

ISO 2470: Paper, board and pulps - Measurement of diffuse blue reflectance factor (ISO brightness)

GB/T 8940.2: Pulp Preparation of laboratory sheets for the measurement of brightness GB/T 2913: Test for whiteness of plastics

GB 12097: Test for whiteness of starch

GB/T 13025.2: Method of measuring whiteness in salt industry

FZ/T 50010.7: Viscose fiber - Determination of pulp whiteness

GB/T 5950: Method for measurement of whiteness of building materials and non-metal mineral products

GB/T 9338: Method of instrumental measurement of whiteness of fluorescent whitening agents

ISO 2471: Paper and board Determination of opacity (paper backing) - Diffuse reflectance method

GB/T 1543: Paper and board - Determination of Opacity (paper backing) Diffuse reflectance method

GB/T 10339: Testing method of light scattering and absorption coefficient for paper and pulps GB 9087: The white powdered standard plate for colorimetry and photometry Main technical

 

3.  Specifications

 

(1)    Zero drift: ≤0.1%

(2)    Indicating drift: ≤0.1%

(3)    Indicating error: ≤0.5%

(4)    Repetitive error: ≤0.1%

(5)   Specular reflectance error:  

(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

(8)    Working condition:Temp.0-40^oC, relative humidity≤85

(9)    Size and weight: L×W×H365×260×425mm, 11kg

 

4.  Main features

 

Use optical-electro-mechanical integration and microcomputer control technology, have the functions of test data processing and measure the whiteness (brightness) of various objects. The instrument accord with GB3978: Standard lighting and lighting observation condition. Simulate D65 illuminator to illuminate, adopt d/o illuminating--geometrical viewing conditions (ISO 2469), Diameter of the globe of diffusion is 150mm and diameter of the testing hole are 30mm and 19mm. Light absorber is provide to eliminate the effect of mirror reflection. The peak wavelength is 457nm, the full width at half peak value is 44nm, both of them are produced by Spectral power of R457 brightness optical system. RY optical system accord with GB3979: Method for color of objects. 

(1)     Measure ISO Brightness (R457), fluorescent whitening degree produced by fluorescent substances in fluorescent whitening samples.

(2)     Measure lightness stimulus value Y10

(3)     Measure opacity

(4)     Measure transparency

(5)     Measure light scattering coefficient and optical absorption coefficient

(6)     Several measurements can get arithmetic mean value of a series of measurements

(7)     With power-off protection, although longtime power failure, the zero, calibration, standard samples and other useful information will not be lost.

 

5.  Supporting sampling apparatus

     HY-1 Constant Sampler