Causes |
Countermeasures |
- dye sensitivity to hydrolysis, reduction,
electrolyte |
- select dyes carefully, control pH exactly
(buffer system) - pay attention to stability
of dye to electrolytes |
- dye sensitivity to metal ions in the
dyebath |
- use suitable sequestering agent |
- dyes of different chemical constitution
affect each ocher (rare) |
- pay particular attention to selection
of dyes and chemicals |
- dye buildup affected by chemicals (retarding
effect) |
- carry out lab tests |
- different dyeing programmes |
- pay
attention to consistent dyeing conditions |
- different liquor ratios |
- dye shows differences in
standard conformity |
- check supplies |
- unsuitable dye combination |
- pay attention to behaviour
of individual elements |
- sedimentation of liquid
dyes |
- stir before removal from
container |
- bath exhaustion affected
by reserve of adjacent fibre |
- adapt dye selection and
process |