Sampling Protocol
Internal moisture testing methodologies extract internal core specimens from fibrous raw material bales to determine true moisture regain percentages. Within mill receiving operations, moisture core sampling establishes accurate invoice weights for imported raw flax shipments. Technicians drive hollow sampling probes into random bale packages across incoming container loads to gather unexposed fiber cores.
Immediate encapsulation of extracted cores in vapor-tight containers prevents atmospheric moisture exchange prior to laboratory weighing. The sampling process governs receiving moisture verification, concluding when core specimens complete laboratory oven drying.
Gravimetric Determination
Laboratory balances weigh sealed core samples before technicians place specimens into forced-air drying ovens set at one hundred five degrees Celsius. Heating continues until successive weighings confirm complete evaporation of capillary and absorbed moisture. Comparing dry sample mass against initial wet weight yields the precise moisture regain ratio for the sampled lot.
Conducting moisture core sampling protects mills from paying raw fiber prices for excess water absorbed during ocean transport. Consistent application of this testing protocol ensures landed fiber shipments meet contractual regain specifications before release into processing.
Package Limitation
Surface moisture variations caused by high humidity during sea transport fail to reflect interior bale conditions. Sampling only outer bale layers generates inaccurate moisture readings that distort overall shipment calculations. Moisture core sampling applies strictly to compressed bale packages, offering no utility for loose fiber strands or open sliver webs.