Mercerization Chemicals

Mercerization is a controlled caustic-soda treatment that swells cottonnfiber under tension to raise luster, tensile strength, and dye uptake. Thenworking chemistry is concentrated sodium hydroxide (caustic soda) applied at highnstrength, followed by thorough acid neutralization. Caustic soda does the structuralnwork; acetic acid resets fabric pH before the goods move to dyeing.

Caustic soda is the only active that swells cotton enough to lock in mercerizednluster. Mills typically run cold mercerization at roughly 25-30 u00b0Bu00e9 caustic for fullnfiber swelling. The trade-off is real: higher caustic concentration lifts luster andndye affinity but increases shrinkage-control demands, fabric-handling difficulty, andnthe downstream neutralization load. Specify caustic strength to the fabricnconstruction, not to a single house standard.

After caustic treatment, residual alkali must come off the cloth before dyeing ornshade reproducibility suffers. Acetic acid neutralizes faster and more controllablynthan a water-only wash, and it leaves the goods at a dye-ready pH. Target a finalnfabric pH near neutral (about 6.5-7.5) and confirm with a test strip before the dyenbath. A dedicated alkali-stable wetting agent is dosed separately to speed causticnpenetration.

• Cold caustic mercerization of woven and knit cotton for luster and improved dye uptake
• Tension mercerization of yarn and fabric to raise tensile strength and dimensional stability
• Pre-dye caustic treatment to deepen reactive and direct shade yield
• Post-caustic acid neutralization to return goods to a dye-ready pH
• Caustic make-down and replenishment on continuous mercerizing ranges

• Sodium hydroxide (caustic soda) u2014 PubChem
• Acetic acid u2014 PubChem