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| Direct Black FF |
| Alias：Direct Black FF；Atul Direct Black FR（AP） |
| Color index：C.I. Direct Black 9 (31560) |
| English name：Direct Black FF；Atul Direct Black FR（AP）；Direct Fast Black FF（CNC） |
Structural formula： |
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Process flows ： |
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| Characters：black equal powder and soluble in water to become black with red light. Slightly soluble in alcohol and insoluble in other organic solvents. |
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| Quality standard Tianjin /HG 2—920—82 |
Index name |
Index |
Apperance strength，separated coloured light Color fastness in wool wool fabrics， impurity content insoluble in water，% moisture content，% fineness（passing 180 meshes residual content），%
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black equal powder similar to standard products accord to standard products ≤1.5 ≤7 ≤5
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| Use：Mainly used in cotton, hemp and other fabric dyeing, and suitable for silk and chinlon dyeing. |
| Application performance：Colour fastness(grade) in cotton fabrics： |
Solarization |
Soaping |
Water leaching |
acid resistance （organic acid） |
alkali resistance |
fading |
staining |
fading |
staining |
3 |
1～2 |
- |
2～3 |
- |
4 |
4～5 |
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