|
ITEM
|
INDEX
|
|
APPEARANCE
|
FLAKES
|
|
NAOH % ≥
|
99.0
|
|
NA2CO3 % ≤
|
0.5
|
|
NACL % ≤
|
0.05
|
|
FE2O3 % ≤
|
0.006
|
