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ISO Tests

Testing was performed by an ISO/IEC 17025 accredited external service provider. Performed mesurements:

Washing and drying procedures EN ISO 6330
Electrostatic properties EN 1149-2
Tensile strength and elongation ISO 13934-2
Dimensional change of textiles as a result of washing and drying EN ISO 3759, EN ISO 5077, EN ISO 6330
General appearance after washing (inhouse method)
Antibacterial activity of textile fabrics, absorption method ISO 20743

See method below. Or download the full report.

Method

Vertical resistance of textiles – EN 1149-2:2000
The test methods measure in different ways the electrical resistance of materials which corresponds to how resistant the materials are to the accumulation of charge. This resistance is measured in “Ohms”. For example gloves used in ATEX (environment with an explosive atmosphere) areas require less than 1×10^8 Ohms vertical resistance to be compliant to EN 16350.

Sample	Result			Comments
	Before wash/drying	After 7N wash	After 9N wash
A	2,0*10^3	2,1*10^3	8,4*10^6	Vertical resistance remained the same after 5 cycles 7N wash but increased significantly after 9N wash. The sample can be categorized as conductive (typical range 10^3 – 10^5 Ohm) and slightly dissipative after 9N wash (10^6 – 10^9 Ohm).
B	2,0*10^3	5,17*10^5	5,48*10^6	Increase in vertical resistance already after 7N wash. The sample can be categorized as conductive (typical range 10^3 – 10^5 Ohm) and slightly dissipative after 9N wash (10^6 – 10^9 Ohm).
C	2,0*10^3	2,56*10^5	2,52*10^6	Very similar to sample B

Method

Dimensional change in washing and drying – ISO 5077: 2008, EN ISO 6330: 2022
Dimensional stability in fabrics or Shrinkage is the change of dimensions in textile products when they are washed or relaxed. The change is always expressed relative to the dimensions before the exposure of washing or relaxing. Shrinkage is also called residual shrinkage and measured in percentage.

Sample	Result			Comments
	Before wash/drying	After 7N wash	After 9N wash
A		196/124*		Similar shrinkage in all samples. Some fibers are more prone to shinkage, e.g. natural fibers like wool and cotton shrink more than polyester and nylon, because they have more irregular and curly shapes that can contract or relax when exposed to water or heat.
B		196/124*
C		196/124*

Method

Maximum force using the grap method (before and after washing) – ISO 13934-2: 2014
Grab method test is a tensile test in which the central part of the width direction of the specimen is held by a clamp. *Calculated averages in longnitudal and cross direction.

Sample	Result			Comments
	Before wash/drying	After 7N wash	After 9N wash
A	196/124*	186/128*		No significant change after 5 cycles 7N wash.
B	198/150*	186/150*		No significant change after 5 cycles 7N wash.
C	246/164*	192/174*		The strongest of the 3 samples in the beginning but similar level after 5 cycles 7N wash.

Method

Antibacterial activity of textile products. Absorption method – EN ISO 20743:2021-12
A ‘quantitative test’ used to determine the antibacterial activity of all antibacterial textile products. It is designed to test the ability of fabrics that have been treated with antimicrobial agents to prevent microbial growth and to kill microorganisms over an 18-24 hour period. In the absorption method the test bacterial suspension is inoculated directly onto specimens. Results are reported as Antibacterial Activity Value (A). The Antibacterial Activity (A) is defined by the standard as the activity of an antibacterial finish used to prevent or mitigate the growth of bacteria, to reduce the number of bacteria or to kill bacteria.

Sample	Result			Comments
	Before wash/drying	After 7N wash	After 9N wash
A	5,08 / >7,54			Efficacy of the antibacterial activity in the test sample can be considered strong.
B	>6,43 / >7,54			Efficacy of the antibacterial activity in the test sample can be considered strong.
C	>3,73 / >4,41			Efficacy of the antibacterial activity in the test sample can be considered strong.