28 · Preparation, dyeing and colour
Dye Recipe and Lot Repeatability
A recipe alone is insufficient; material, machine, water, process curve and finishing history belong in the same traceable record.
Values to be checked
- Values to be checked 01
- Recipe version
- Values to be checked 02
- Machine identity
- Values to be checked 03
- Water quality
- Values to be checked 04
- Process history
Preparation, dyeing and colour
Uniform preparation, the right dye class, controlled recipes and a physical colour standard underpin repeatable lots.
19
Greige Fabric Control and Lot Preparation
Greige rolls must be checked for structure, GSM, width, oil, stains and lot identity before a dye recipe can be managed reliably.
20Scouring and Absorbency
Controlled removal of oils, waxes and process auxiliaries creates uniform wetting and a repeatable dyeing substrate.
21Bleaching and Optical White
Whiteness must be balanced against fiber damage, strength, yellowing risk and the subsequent colour route.