Process

%

Chemical

^oC

Time(min)

PH

Comments

Washing

200

Water

40

0.3

Rockol 642

0.2

Oxalic acid

20

Drain

100

Water

35

Retannage I

3

Chrome ( 26 / 33 )

2

Rockytan RHN

0.3

Sodium formate

60

0.5

Rockytan TAK

30

4.5

Drain

150

Water

35

1.5

Rockytan RPR

0.7

Sodium formate

45

0.7

Sodium bicarbonate

3×15

5.3

Check Ø with B.C.G

Drain

Washing

300

Water

35

15

Drain

80

Water

35

Retannage II

4

Rockytan RR7

30

3

Rockytan RD

30

2

Rockytan ROS

20

2

Rockytan RP2

3

Mimosa extract

2

Chest nut extract

Dyeing

3

Dye ( mixed )

60

Check Ø penetration

0.4

Formic acid

30

Drain

Washing

200

Water

50

3

100

Water

50

Fatliquoring

3

Rockol OPS-322

2

Rockol LNP-375

1.5

Rockol OFM-345

0.5

Rockol OFL

60

1.3

Formic acid

2×15

3.5-3.7

Drain

Washing

200

Water

20

10