Defixing
Danfix series with outstanding defixing properties
Defixing treatment
Defixing is indispensable in fixing treatment. The Danfix series for cellulosic fibers produces outstanding defixing properties.
Nittobo Specialty Chemicals Division recommends the following methods of use for the removal and blocking of cationic fixing agents from cellulosic fibers.
1. Standard defixing recipe
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Nonionic penetrant
Soda ash calc.
Masking agent |
2 cc/L
5 g/L
2~3g/L |
Liquor ratio 1:15-20, treatment between 80°C and 100°C for 20 minutes, followed by warm and cold rinsing.
2. Recipe for simultaneous defixing and decoloring
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Nonionic penetrant
Soda ash
Hydrosulfite
Masking agent |
2 cc/L
5 g/L
3~5g/L
2~3g/L |
Liquor ratio 1:15-20, treatment between 80°C and 100°C for 20 minutes, followed by warm and cold rinsing.
3. Recipe for simultaneous defixing, decoloring and bleaching
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Nonionic penetrant
Caustic soda(flakes)
Hydrogen peroxide(35%)
Masking agent |
2 cc/L
2 g/L
3 cc/L
2~3g/L |
Liquor ratio 1:15-20, treatment between 80°C and 100°C for 20 minutes, followed by warm and cold rinsing.
4. Recipe for fixing agent with copper content
Add 0.5-1 g/L chelating agent to the above 1-3 recipes. |