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Test Item

Test Standard and Method

Color

To grind mixture of sample, standard sample and compound and make film by thin-film device.

Whiteness

According to GB/T5950, test it via leucometer.

Particle-size distributing

Test through laser particle-size analyzer. Average particle size is got from intermediate value of particle-size distributing.

Specific Area

Transferred from average particle size. It refers relative area of 1g material.

Apparent Specific Gravity

50g sample in 100cc metering cylinder with calibration, average measured value after sample dropping down from 5cm height 150 times.

Settling Volume

Put 15g samples into the 100cc measuring cylinder attached with bolt, add 100cc of water to the cylinder and then shake it tempestuously for a moment. Test settling volume after one hour.

Oil Absorption

JIS-K510 method: add flaxseed oil till it turns to lump

Reducing Power

According to GB5211.16-88, grinding mixture of some white pigment and blue paste and outsight reducing power.

Hiding Power

Make color paste and brush it on glass plate with checkerboard image evenly. The lowest usage( g/m2)stands for its hiding power

Residue at 325 mesh

GB5211.18-88: filtrate 1000g sample which is put on 325 mesh strainer by damp process.

Volatile at 105

GB5211.3-85: 110two hours.

Water Soluble Matter 

GB5211.2-85: extraction.

Density

GB1713-79: pycnometer method.  

Light resistance

Observe the degree of discoloration of the Sample plate and the standard plate by exposuring, and evaluate the degree of light resistance. 

PH Value

Water extraction and measured by PH survey.

Ignition Loss

Measure sample quantity after igniting quantitative sample at 900.

Abrasion Value

 

 

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