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Basis weight (ASTM D3776): determines the weight of the fabric
structure. |
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Air permeability (ASTM D737 and IST 70.1): measures the flow
of air through a nonimpervious material at a specific pressure
differential. Indicates the materials breathability and
coolness during use.
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WVTR (ASTM E96 and IST 70.2): measures the rate of water vapor
transmission (WVTR) through an impervious material.
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Handle-O-Meter (IST 90.3): measures the weight (in grams)
necessary to push a material through a 1/4" slit. The lighter
the weight needed, the more drapable the material. |
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Hydrostatic pressure (AATCC 127 and IST 80.4): measures the
resistance of fabric to penetration by water under constantly
increasing hydrostatic pressure.
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Water impact (AATCC 42 and IST 80.3): measures the resistance
of fabrics to penetration by water spray impact. Indicates how
the material will perform when fluids fall or splash onto the
fabric.
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Mason jar test (IST 80.5): measures the resistance of fabrics
to penetration by saline solution under a constant pressure.
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Alcohol repellency (IST 80.8): measures the resistance of
fabrics to penetration by aqueous isopropyl alcohol solutions.
Indicates how the material will perform when alcohol, blood
or body fat comes in contact with the fabric. |
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Mullen burst (ASTM D3786 and IST 30.1): measures the resistance
of fabrics to puncture under increasing pressure. Indicates
the materials resistance to blunt pressure.
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Elmendorf tear (ASTM D5734 and IST 100.1): measures the resistance
of fabric to tear under a controlled force. Indicates the materials
resistance to tearing when there is an initial tear in the fabric.
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Grab tensile (D5034 and IST 110.1): measures the resistance
of fabric to break under an increasing pulling stress. Indicates
the materials resistance to breaking when there is no
initial tear in the fabric.
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Trapezoid tear (ASTM 5733 and IST 100.2): determines the
load required to propagate a tear. |
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Helmke Drum (ASTM F50-83): determines the cleanliness of garments
by measuring the particles emitted per minute when garments
are rotated in a drum. The smaller the count, the cleaner the
garment.
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Gelbo flex (IST 160.1): measures the number of lint particles
removed from a fabric during repeated flexing. Indicates the
materials comfort level. |