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The methods and materials described in Federal or military specifications, standards, drawings, or other authorized documents or systems designed to prevent damage or deterioration during distribution or storage of material.

A means of specifying the level of military preservation and packing that a given item requires to assure that is not degraded during shipment and storage. Specific levels of protection are as follows: a. Military level of Preservation. Preservation designed to protect an item during shipment, handling, indeterminate storage, and distribution to consignees worldwide. b. Military Levels of Packing. (1) Level A. Protection required to meet the most severe worldwide shipment, handling, and storage conditions. A level A pack must, in tandem with the applied preservation, be capable of protecting material from the effects of direct exposure to extremes of climate, terrain, and operational and transportation environments. (2) Level B. Protection required to meet moderate worldwide shipment, handling, and storage conditions. A Level B pack must, in tandem with applied preservation, be capable of protecting material not directly exposed to extremes of climate, terrain, and operational and transportation environments.

The processes and procedures used to protect material against corrosion, deterioration, and physical damage during shipment, handling, and storage. As applicable, preservation includes cleaning, drying, application of preservative, wrapping, cushioning, containers (unit and intermediate) and complete identification markings up to but not including the exterior shipping container.

MIL-PRF and MIL-DTL -117H can be very confusing. MIL-PRF describes the performance standard and MIL-DTL-117H describes the packaging method. MIL-PRF is followed by additional codes such as MIL-PRF-131K, MIL-PRF-121G, MIL-PRF-22191-E, and MIL-PRF-81705-E. Each of these codes also corresponds to a packaging method. For instance MIL-PRF-131K Class 1 corresponds to MIL-DTL-117H-Type I-Class E-Style 1. These codes refer to such information as heavy duty, water/vaporproof, greaseproof, etc.

PI stands for Volatile Protective Inhibitor and VCI is an acronym for Volatile Corrosion Inhibitor. VCI and VPI chemicals are a class of corrosion inhibiting compounds, which have sufficient vapor pressure to release molecules from the compound into the air. Edco distributes packaging VPI/VCI products packaging products, which contain proprietary AN-OX VCI chemicals directly in the packaging. Our packaging products include papers and films which safely prevent corrosion on protected metals without the need for messy grease, oils, protective coatings or other ineffective methods.

A desiccant is a hygroscopic substance that induces or sustains a state of dryness (desiccation) in its local vicinity in a moderately well-sealed container.

Commonly encountered pre-packaged desiccants are solids, and work through absorption or adsorption of water, or a combination of the two. Pre-packaged desiccant is most commonly used to remove excessive humidity that would normally degrade or even destroy products sensitive to moisture. Edco primarily supplies desiccants made from montmorillonite clay and silica gel.

In desiccant terminology, a “unit” is the quantity of desiccant required to meet the U.S. Military’s specification (MIL-D-3464E) for packaged desiccant products. Under this specification, a unit is the quantity of desiccant which will adsorb 3.00 grams of water vapor at 20% relative humidity or 6.00 grams of water vapor at 40% relative humidity at 77°F (25°C).

Static Shielding bags (ESD) have a metalized layer called a Faraday cage that shields the contents from a static charge. Anti-Static bags are made of a neutral material that does not generate nor shield from static.