Process

%

Chemical

^oC

Time(min)

PH

Comments

Washing

200

Water

0.3

Rockol  642

0.2

Formic acid

20

Drain

100

Water

35

Retannage I

1.5

Relugan GTW(BASF)

0.5

Rockol FM-222

20

3

Rockytan RHN

2

Chrome (26/33)

60

1

Sodium formate

30

4.3

Drain

150

Water

35

Neutralization

1

Sodium formate

30

1

Rockol OFL

0.7

Sodium bicarbonate

3×15

5.2

Check Ø with   B.C.G

Drain

Washing

300

Water

35

5

Drain

80

Water

40

1

Rockol FM-222

5

Retannage II

3

Rockytan RE-540

30

5

Rockytan RR7

30

3

Rockytan RD

30

3

Rockytan RAB

Dyeing

3

Dye

3

Chest nut extract

60

Check Ø penetration 

50

Water

60

Fatliquoring

3

Rockol LNP-375

3

Rockol OPS-322

2

Rockol LNE-918

1.5

Rockol FM-222

60

1.5

Formic acid

2× 15

3.7

Drain

Washing

200

Water

5