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PermaNet® Curtains - Quality Control

Area	Test	Frequency
Yarn Incoming	Yarn count	Every new lot
	Yarn shrinkage	Every new lot
	Yarn frictional properties	Every new lot
	Yarn tenacity and elongation; shade match to standard	Every new lot
Chemicals Incoming	Alcohol check	Every new lot
	Deltamethrin assaying	Every new lot
	Other chemicals Origin/intact packaging/physical form check	Every new lot
Netting Incoming	Overall check for impregnable ability	Every new supplier/new yarn
	Physical properties (DS, BS, weight, width, mesh count)	Every new lot
	Defect number/Grading	c.a. 10%
Warping	Quality Control staff supervision
Knitting	Fabric weight, width and mesh	Randomly
	Defect count by Operator	Every roll
	Defect count by Quality Control staff	c.a. 20%
Dyeing	Technical supervision
	Shade match to standard	Daily
	Colour fastness to washing	Quarterly
Heat setting	Technical supervision
	Fabric width	Daily
	Fabric weight and mesh	Daily
	Fabric dimensional stability	Daily
	Fabric bursting strength	Daily
Impregnation	Technical supervision
	Active ingredient content	Every lot of production
	Wash resistance of active ingredient	Daily
	Accelerated lifetime of netting material by bioassay	Daily
	Short-distance variation of active ingredient content	Monthly
Cutting	Receive fabric width	Each fabric roll
Cutting	Visual fabric inspection	100% as fabric laid on table, cut out defects
Sewing	Shade matching	Each set of fabric tops, panels and loops
Sewing	Seam strength	Each new lot
Final inspection	Visual curtain inspection	100% hoist or hang curtains, also gauging the length and width dimensions
Packaging	Labelling accuracy	Each net packed
Packaging	Insecticidal and physical properties on made up curtains	Daily
Baling	Quality Control on finished curtains	Full check according to WHO specification
	Visual style confirmation	Ensure each net to be labeled is of the same style
	Defect count by Quality Control staff	c.a. 20%

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