Greige Fabric Certification Scope and Restricted Chemical Testing Protocols
Greige fabric certification demands batch testing of sizing agents, spin finishes, and biocide residues before finishing treatments mask regulated chemicals.
Polycyclic Aromatic Hydrocarbons
Residue Threshold
Byproduct contaminants often enter the supply chain through low-quality carbon black pigments or extender oils used in rubber and plastic components. A group of chemicals known as polycyclic aromatic hydrocarbons is formed during the incomplete combustion of organic matter. These substances are frequently found in the soft plastic grips and footwear soles of apparel items.
Toxicological Profile
Exposure to several compounds in this category is linked to long-term health risks, including skin irritation and carcinogenic effects. For this reason, polycyclic aromatic hydrocarbons are restricted by international standards such as the AfPS GS mark. Testing focuses on eighteen specific molecules that are known to be the most harmful to human health.
Extraction Method
Laboratory analysis requires the use of ultrasonic extraction with toluene to pull the chemicals from the solid material. Identifying polycyclic aromatic hydrocarbons is done using gas chromatography-mass spectrometry, which can detect them at very low levels. The complexity of the textile matrix often requires multiple cleanup steps to ensure accurate quantification.
Supply Control
Sourcing high-purity raw materials is the primary way for factories to avoid contamination. Regular audits of chemical suppliers help prevent the accidental introduction of polycyclic aromatic hydrocarbons into the production line.