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This method is used to measure the air resistance of approximately 6.45 sq. cm. (l sq. in.) circular area of paper using a pressure differential of 1.22 kPa. The recommended range of the liquid column instrument is from 5 to 1800 seconds per 100 mL cylinder displacement. For more impermeable papers the time requirements become so excessive that other techniques are preferable.
| Author | TAPPI - Technical Association of the Pulp and Paper |
|---|---|
| Editor | TAPPI |
| Document type | Standard |
| Format | File |
| Confirmation date | 2011-06-14 |
| ICS | 85.060 : Paper and board
|
| Year | 2011 |
| Document history | |
| Country | USA |
| Keyword | ANSI 460;ANSI/TAPPI T 460;ANSI/TAPPI 460;460;ANSI/TAPPI T 460 om-2011 |