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Moisture content |
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Table 2, Table 2.1
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Pronunciation
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Subdomain (1st level): |
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Properties |
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Subdomain (2nd level): |
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Physical properties |
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Grammatical category: |
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Complex term |
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Grammar notes: |
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Countable |
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Definition: |
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Quantity of water that paper contains, expressed as a percentage of the total paper weight. |
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Definition source: |
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Brewer (2003) |
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Context: |
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The usual and standard way to estimate a paper’s moisture content is to measure the change in mass when a sample is dried in an oven at approximately 105°C, long enough to reach a constant mass (1-2 hours for normal air dry paper). The sample is then cooled in a desiccator and weighed. Moisture content is usually expressed on a “moist basis”, (i.e. loss of water as a percentage of the total mass), but can also be expressed on an “oven dry (OD) basis” (i.e. loss of water as a percentage of the mass of OD paper). In either case, the measured value is slightly lower than the true value because the humidity of the air circulating in the oven (basically ambient air) prevents the paper from becoming completely dry. Normally this inaccuracy is unimportant, amounting to errors around 0.2% moisture content. If greater accuracy is required, the humidity of the oven’s ambient air may be specified or a different technique can be used, for example distillation in toluene. |
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Context source: |
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EN 48 |
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Attestation: |
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2 |
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Co-hyponyms: |
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Smoothness, Roughness, Porosity, Dimensional stability, Equilibrium relative humidity, Degree of sizing |
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Hyperonyms: |
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Physical properties |
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It:
Umidità assoluta
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Degree of reliability IT:
3
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Fr:
Humidité absolue
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Degree of reliability FR:
3
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