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ASTM D1434 - Standard Test Method for Determining Gas Permeability Characteristics of Plastic Film and Sheeting; ASTM D3079 - Standard Test Method for Water Vapor Transmission of Flexible Heat-Sealed Packages for Dry Products; ASTM D4279 - Standard Test Methods for Water Vapor Transmission of Shipping Containers-Constant and Cycle Methods
Moisture analysis covers a variety of methods for measuring the moisture content in solids, liquids, or gases.For example, moisture (usually measured as a percentage) is a common specification in commercial food production. [1]
in the condensation of the water-vapour of the air on the cold surface of a glass; in the capillarity of hair, wool, cotton, wood shavings, etc.; in the imbibition of water from the air by gelatine; in the deliquescence of common salt; in the absorption of water from the air by concentrated sulphuric acid; in the behaviour of quicklime". [4]
Glass, plastic and quartz cuvettes are all suitable for measurements made at longer wavelengths, such as in the visible light range. "Tandem cuvettes" have a glass barrier medium that extends two-thirds of the way up in the middle, so that measurements can be taken with two solutions separated and again when they are mixed.
Military shipping container being drop tested Testing modified atmosphere in a plastic bag of carrots. Package testing or packaging testing involves the measurement of a characteristic or property involved with packaging.
Equipment for a drop test of cushioned package to measure the transmitted shock. Proper performance of cushioning is dependent on its proper design and use. It is often best to use a trained packaging engineer, reputable vendor, consultant, or independent laboratory. An engineer needs to know the severity of shock (drop height, etc.) to protect ...