TEST ITEMS
|
SPECIFICATION
|
APPEARANCE
|
BLACK POWDER
|
SHADE
|
BLUISH
|
DBP ABSORPTION NUMBER
|
77-87 cc/100g
|
BET SURFACE AREA
|
101-141 m 2 /g |
pH VALUE
|
3.5-5.5
|
AVERAGE ORIGINAL PARTICAL SIZE
|
27-31 nm
|
DENSITY
|
145-185 g/l
|
IMPURITY
|
NO FOUND
|
VOLATITE
|
4.8-5.2%
|
TINTING STRENGTH vs IRB#3
|
110 % min
|