Specific Surface Area: by UK Malvern Instruments Ltd. model type Mastersizer ( Laser Particle Size Analysis ).

Average Particle Size: by UK Malvern Instruments Ltd, model type Mastersizer.

Moisture: by Germany Sartorius Company's model type A-30 testing moisture content.

Whiteness: by Japanese company model type C-100-3.

Bulk Density Tapped: put 5g powders into a 20cc beaker with the graduation line. Fall it 100 times from 5cm height.

Residue on 325 mesh: by wet process with sample 1000g on JIS 325 sieve.

Sediment Volume: put 15g of sample into a 100cc glass cylinder and add water to make 100cc. Shake the glass cylinder vigorously then let stand still for the hours specified and measure the precipitation volumes.

Oil Absorption Value: JIS-K5101, adding linseed oil, adding linseed oil drop wise and find the point of making a lump.

Water Absorption Value: adding water drop wise and find the just point of making fluidization.

DOP Absorption Value: JIS-K5101; adding DOP drop wise and find the point of making a lump.

PH Value: JIS K-5101 A method.

Ignition Loss: sample is ignited at above 900° until constant weight and weighted as loss.