|
ITEM
|
SPECIFICATION
|
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|
category I
|
category II
|
category III
|
|
|
Cr2
|
24-26%
|
21-23%
|
21-23%
|
|
Alkalinity
|
33 ± 1%
|
40 ± 1%
|
33 ± 1%
|
|
Iron (Fe) content
|
0.1%MAX
|
||
|
Water insoluble
|
0.1% MAX
|
||
Function: all leather and fur tanning and the main retanning, especially in high-grade leather tanning.