Paperboard Moisture Equilibration Rates under Cold Warehouse Storage
Cold warehouse paperboard equilibrates at rates four times slower than ambient standards, requiring staged thermal reconditioning to prevent moisture edge defects.
Billable Dry Weight
Commercial Mass
Standardised mass calculations for pulp and paper shipments adjust the physical tonnage to account for a certified moisture level. This billable dry weight represents the theoretical weight of the material if it were dried to a theoretical moisture content of ten per cent. It establishes a consistent basis for pricing, ensuring that buyers do not pay for excess water absorbed during marine transit.
Moisture Calculation
To calculate this commercial value, technicians draw representative core samples from the incoming pulp bales and weigh them before placing them in drying ovens. The samples remain in the oven at a specified temperature of one hundred and five degrees Celsius until they reach a stable weight. The ratio of dry fibre to total weight is then applied to the total scale weight of the consignment.
This standard procedure prevents disputes over moisture variations caused by environmental exposure or rain during transport.
Contractual Application
Supply contracts specify the acceptable range for this value. If the measured dryness deviates from the baseline, the transaction value is adjusted to reflect only the standardised fibre tonnage. This protects both parties against seasonal humidity changes that alter shipment weights without changing the actual quantity of usable fibre.