تJINTE Provides the Troubleshooting Service of Pre-Treatment, Dyeing & Finishing.

Fabric Yellowing


Generally, there are two types of yellowing in textiles: light and phenolic yellowing.
Light yellowing refers to the fabric's exposure to sunlight or UV rays. Not only is the fiber strength damaged, but also the hue is changed

JintexEco TUV Polyester Sunlight fastness improving agent. This UV-blocking agent can prevent significant fiber degradation after sunlight exposure, as well as increase textile UPF.
JintexEco NUV Nylon
JintexEco CUV Cotton


Phenolic Yellowing

Phenolic yellowing refers to textile yellowing caused by the antioxidant in packing materials or the lignin in the carton.
Anti-phenolic yellowing agent absorbs NOx to prevent the yellowing resulted from NOx oxidized BHT.

JintexEco APY Nylon Nylon anti-phenolic yellowing agent. Light colors can be washed with color fixation. Usually used after color fixation. The residual liquid after 60 degrees Celsius is pH4.5 and brings better effects.
High Temperature Yellowing

A high temperature setting requires high energy heat and this would result in a large amount of NOx attaching to the fiber surface easily and lead to yellowing.

JintexEco OR All Fibers Prevent fabric yellowing caused by high temperature oxidization, as well as the yellowing of pressed fabrics. Grey setting, setting after relaxing. Used for setting after dyeing.
Storage Yellowing
NOx is the product of high temperature burning. It can be generated from fossil fuels and coal-fired power stations, emissions from vehicles, high temperature heating processes in manufacturing, lightning, etc. If the storage environment cannot effectively separate the above-mentioned sources (less ideal environmental management), fabrics will easily come in contact with NOx and result in yellowing.
Auxiliary Yellowing
Common cation softening agents, usually quaternary ammonium salt. This kind of softening agent has an excellent effect and often contains -NH4 radical groups. These groups can combine with NOx in air easily and yellow the fabrics gradually. Therefore, it's important to select the auxiliaries.


What causes clothes pilling?
The possible causes of pilling include fiber length, yarn twist, fabric structure, and static.
When the material quality of man-made fibers is not stable enough and yarn twisting or rubbing fastness is insufficient, fibers will break easily and pilling will occur.


A. Man-made fiber
  1. Improve Twist-Texture
  2. Anti-static
  3. Increase smoothness
  4. Anti-pilling finish
B. Natural fibers
  1. Singeing
  2. Bio-polishing

Singeing: Remove the fluff on the fiber surface by high temperature to decrease the defects as well as improve fabric quality.

Bio-polishing: Remove cellulose fibers and pills generated by mechanical scratching on blended fabric, bio-polishing treatment

Jintexyme BTH Cotton Fiber Remove surface pills, increase fabric glaze, bring a soft touch and improve pilling and rubbing fastness.
Jintexyme STW Cotton Fiber Remove surface pills, increase fabric glazes, bring a soft touch and improve pilling and rubbing fastness.


When producing polyester fibers, certain substances with insufficient aggregation will become linear or circular by-products, which we call oligomers.
A circular oligomer has low water solubility and will result in various problems to the dyeing process.
When polyester fabrics are processed under high temperature, oligomers will move from the fiber to the surface, permeate into the dye and then aggregate and attach to the fiber surface. This will result in abnormal dyeing, white powder on the cloth, dye coagulation, color spots and tank wall contamination, etc.
The abnormal rate caused by oligomers is particularly high on canister yarns. When the oligomer attaches to the fiber surface, it would lead to broken yarns and cause difficulties when winding and weaving yarns.


  1. High temperature emission: increase the energy by high temperature to decrease the incident ratio of oligomers attaching to the fiber surface again.
  2. Add OLA in the dye: effective dispersal agent to restrain oligomers from separating out and attaching to fibers or equipment surfaces.
  3. Use OLA/CL-182 with alkali reducing wash:hydrolyze oligomers to decrease the stain.
  4. Add OLA/CL-182 when cleaning the tank: effectively prevent oligomers from attaching to the equipment surface.
JintergEco OLA Man-Made Fiber Remove oligomers and prevent them from attaching again. Use with the dyeing process, post-washing process, or tank cleaning.
JintergEco CL-182 Man-Made Fiber Enhance oligomer emulsion to achieve a better tank cleaning.