Moisture Baseline
Analytical procedures for determining fiber content in commercial pulp shipments rely on removing all water from the testing samples. The bone dry mass calculation establishes the theoretical weight of a paper shipment if it contained zero percent moisture. This metric allows buyers to compare the cost of different pulp grades on an equal basis.
Mathematical Execution
To calculate this value, technicians first measure the wet weight of the extracted pulp core. The sample is then heated to a temperature of one hundred and five degrees Celsius until it reaches a constant weight. By dividing the dried weight by the initial wet weight, the moisture fraction is determined.
Finally, applying the bone dry mass calculation to the total shipment weight yields the true tonnage of usable cellulose fiber. This calculated value provides the baseline for contract fulfillment.
Commercial Application
Buyers of premium chemical pulp require this measurement to prevent paying for water during transit. Because ambient humidity alters the physical weight of fiber rolls, transactions are rarely billed on raw weight alone. Instead, invoice adjustments are calculated against standard commercial dryness levels, which are derived from this basic moisture test.
This standardized invoicing prevents financial loss from humidity fluctuations during ocean voyages.
