Quantifying Residual Coning Oils in Quantitative Viscose Content Determination
Unextracted coning oils add false mass to insoluble fiber fractions during quantitative chemical dissolution, distorting declared viscose blend percentages.
ISO 6741 Commercial Regain
Moisture Calculation
Standardized values for the amount of water a fiber is expected to hold under normal atmospheric conditions are used to adjust the weight of textile shipments. The iso 6741 commercial regain provides the specific percentages for different fibers that must be added to the oven dry mass. This calculation ensures that buyers do not pay for excess water.
It applies specifically to the mass determination of fibers and yarns for trade.
Mass Determination
Actual weight of a lot is determined by drying a sample until all moisture is removed and then applying the agreed percentage. According to the iso 6741 commercial regain, cotton has a different allowance than wool or polyester. The corrected weight is known as the commercial mass of the shipment.
Invoice Settlement
Financial transactions between the mill and the garment factory are based on the calculated mass rather than the weight at the time of packing. Using the iso 6741 commercial regain prevents disputes that arise from changes in humidity during transport. It provides a fair basis for pricing commodities like yarn and raw fiber.
Standard Atmosphere
Consistency in testing is maintained by conditioning the samples in a room with controlled temperature and humidity. The iso 6741 commercial regain values are based on an equilibrium state reached at twenty degrees Celsius and sixty five percent relative humidity. It is the international reference for all weight based trade.