Grey mélange fabric overdyeing process: soda scour, 80°C migration and the full reactive curve
Grey mélange overdyeing process for knit fabric: low-alkali soda and peroxide scour, reactive curve with 80°C migration, and running shade control.
Cationic dyeable (CD) polyester dyeing process: cationic dyes at 110°C
CD polyester dyeing process for knit fabric: acid pre-wash, cationic dyes at pH 4 and 110°C, blends with polyester and cotton, and…
Yarn-dyed knit fabric enzyme wash process: clean surface without colour bleeding
Yarn-dyed knit fabric enzyme wash: anti back-staining wash, enzyme at pH 4.5, hairiness check, fixing and softener, and how to stop stripe…
Natural dyeing process for cotton knit fabric: salt first, colour at 30°C, fix at 80°C
Natural dyeing process for cotton and organic cotton knit fabric: mordant, salt first, colour at 30°C, 80°C exhaustion, and fastness limits.
Antimicrobial finish on knit fabric: how we apply it in the dyeing machine
Antimicrobial finish on knit fabric: exhaust in the dyeing machine at pH 5–5.5 and 40°C, or padding on the stenter, and testing…
How Cationic (Basic) Dyes Work on Acrylic and CD Polyester
Cationic dyes bond ionically to a small number of negative sites in acrylic and CD polyester. Learn why they strike so fast…
How direct dyes work on cotton: affinity, salt and after-treatment
Direct dyes colour cotton from a simple salt bath, held only by physical forces. Here is why their shape gives affinity, how…
How vat and sulphur dyes work: reduce, dye, oxidise
Vat and sulphur dyes start as insoluble solids. They are reduced to a soluble form, absorbed by cotton, then oxidised back inside…
Dyeing methods: exhaust, continuous and semi-continuous (pad-batch), and dyeing at each stage
How exhaust machines, pad-dry-fix ranges and cold pad-batch put dye on fabric, how to pick a method, and what dyeing at the…
Dyeing recipe calculation: liquor ratio, shade %, g/L and how much to weigh
Dyes are calculated on the fabric, chemicals on the water. Here are the formulas, the liquor ratio and bath volume, owf to…