1、 Overview
The whiteness tester is a specialized instrument for measuring the whiteness of objects, widely used in industries such as papermaking, printing, textile printing and dyeing, building materials, chemical industry, grain, salt production, and other production and inspection departments that need to measure the whiteness of objects.
2、 Application scope
Paper, cardboard, plastic, pulp; Salt, industrial
Use powders such as salt, starch, calcium carbonate, talcum powder, etc.
3、 Product features
This instrument complies with GB3978-2008: Standard Lighting Bodies and Geometric Conditions. Simulate D65 illumination. Using d/o illumination to observe geometric conditions, the diameter of the diffuse sphere is 150mm, the diameter of the test hole is 30mm (or 19mm), and a light absorber is installed to eliminate the influence of specular reflection of the sample. The peak wavelength of the spectral power distribution of R457 whiteness optical system is 457nm, with a half width of 44 nm, The Y10 optical system complies with GB/T3979-2008 "Methods for measuring the color of objects";
Measurement of ISO whiteness (R457 blue light whiteness) and Z whiteness (Rz)
Measure the fluorescence whitening degree generated by the emission of fluorescent substances (sample containing fluorescence whitening)
Measure the whiteness of the powder
Measure opacity OP, light scattering coefficient S, light absorption coefficient A, transparency, and ink absorption value
Measure the brightness stimulus value Y10, which is the green light diffuse reflection factor Ry
Determination of lead core concentration
4、 Product features
Advanced circuit design effectively ensures the accuracy and stability of measurement data.
It is possible to measure multiple times and provide the arithmetic mean of a series of measurement results.
Increase data cache to facilitate users to backup, view, and compare historical data, and store up to ten reference sample information in memory.
The instrument has a power-off protection function, and calibration data will not be lost after power failure.

This instrument is equipped with a standard RS232 interface and can communicate with microcomputer software (purchased separately).

5、 Main technical parameters
Power supply voltage AC (100-240) V, (50/60) Hz
Working environment temperature (10-35) ℃, relative humidity ≤ 85%
Sample size test plane ≥ 30mm, thickness ≤ 40mm
Zero drift ≤ 0.1
Indicating stability ≤ 0.1
Indication error ≤ 0.5
Repeatability error ≤ 0.1
Mirror reflection error ≤ 0.1
Communication interface optional RS232
External dimensions 380 x 260 x 400 mm
Instrument net weight ≤ 12kg
6、 Standard configuration
Whiteness meter host
Black tube
Whiteboard (1 #, 2 #)
Light bulb
Printing paper
Power cord
7、 Optional accessories
Whiteboard (3 #) (to be purchased separately)
Simple powder press, glass cover plate (to be purchased separately)
RS232 interface and microcomputer software (to be purchased separately)
8、 Execution standards
GB/T 7973, GB/T 7974，GB/T 2679，GB/T 1543，GB/T 10339，GB/T 12911，GB/T2913
GB/T 13025.2, GB/T 22427.6，ISO 2469，ISO 2470，ISO 2471，ISO 9416