Moisture Content

Moisture Content refers to the percentage of water weight in a commodity relative to its total weight or dry weight. It is a key indicator in international trade for assessing the quality of agricultural products, minerals, timber, chemical raw materials, etc. Usage scenarios include: specifying upper limits or standard values for moisture content in contract quality clauses; stating measured moisture content in inspection certificates; adjusting weight for pricing based on moisture content (e.g., dry weight pricing). Precautions: It is necessary to specify the testing method (e.g., ISO, ASTM standards) and basis (wet or dry), as different methods yield significantly different results; excessive moisture content may lead to rejection, price reduction, or claims; for bulk cargo, moisture content also affects transport safety and weight determination. Distinction from other terms: Moisture content differs from 'water activity' (which affects microbial growth) and 'moisture regain' (commonly used for textile materials). Foreign trade practitioners should clearly specify the moisture content standard, testing institution, and tolerance in contracts, and note the association with weight terms such as 'dry weight' and 'natural weight' to avoid disputes arising from misunderstandings.