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RESISTANCE OF PAPER TO PASSAGE OF AIR (HIGH-PRESSURE GURLEY METHOD)
Air permeance, Air permeability, Air resistance, Density, Densitometer, Porosity
Provider: TAPPI
Shipping: Available for download - Link will be provided in My ComplianceOnline section
Shipping: Available for download - Link will be provided in My ComplianceOnline section
Price:
$49.00
Product Details
This method is used to measure the air resistance of approximately 6.4 sq. cm. (1 sq. in.) circular area of paper using a pressure differential of approximately 3 kPa. The recommended range of this instrument is for papers that require 10 or more seconds for 10 mL of air to pass through. Refer to the manufacturer's instructions for the upper range limits. For more permeable papers, other techniques are preferable. Instruments are available with automatic timing devices.
This method measures the time it takes for a given volume of air to pass through the test specimen, along with any possible leakage of air across the surface; therefore it is unsuitable for rough-surface papers which cannot be securely clamped so as to avoid significant surface and edge leakage.
It Provides information on:
- Materials
- Calibration
- Sampling
- Test specimens
- Conditioning
- Keywords
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