Research Article
Bleaching Process Investigation of Tunisian Dromedary Hair
Table 1
Experimental conditions of depigmentation process for different fibres samples.
| | Mordanting | Rinsing | Bleaching | Rinsing |
| FeSO4: 2 g/L
Na2S2O4: 1 g/L
HCHO (35–40%): 3 g/L
L.R.: 1 : 20
pH(HCO2H): 4
Temperature: 75°C
Time: 60 min | Cold water
Neutralisation with NH4OH
pH: 11
Temperature: 45°C
Time: 5 min | Na4P2O7 · 5H2O: 4 g/L
EDTA: 2 g/L
H2O2 35%: 3–9 g/L
L.R.: 1 : 20
pH: 9
Temperature: 75°C
Time: 20-30-45-60 min | Pure water
Or
Oxalic acid: 7 g/L
Na2CO3: 8.5 g/L
pH: 11
Temperature: 50°C Time: 5 min |
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