Because powdered milk in tin cans can be preserved longer than powdered milk in bags, and will not produce harmful substances due to changes in the environment. There is also a special coating in tin-coated cans. Layer, which plays the role of isolation and protection.

Packing milk powder in metal cans has been very popular for a long time. For example, commercial cans come in capacities of 400, 900, 1800 and 2500g. The main reason to use metal cans is excellent physical strength, durability, excellent barrier properties against moisture, O2 and light, no taste and hardness.

Because tin steel is easily corroded, a very thin layer of tin is usually coated by electrolysis; In addition, an organic lacquer coating is used to further protect the metal from corrosion and to avoid metal contact with food. Steel cans for powdered milk are usually round in shape and may have a resealable (close-fitting) lid. American tin cans Complying with market standards, cans have a round body with “can ends” at both ends. The body of the can is welded vertically and the ends of the can are welded to the body of the can. To obtain the proper tightness (i.e. to maintain package integrity), an elastomer compound is introduced into the end seam. For canned goods with re-sealable lids, it is common to seal the underside of the top of the can with a thin layer of aluminum foil to ensure integrity during storage and distribution.

Powdered milk has a long shelf life when packaged in metal containers due to their excellent barrier properties. The exchange of moisture and O2 and the flow of light is not possible. Flour with a higher fat content is more prone to oxidation, and most flours are susceptible to spoilage such as lumps and caking due to moisture penetration. With properly constructed canisters, a shelf life of more than 5 years is realistic, especially when FMP products have been flushed with N2 gas to minimize the amount of O2 available. However, national food safety authorities generally take a cautious approach by reducing the indicated shelf life. Non-fat milk powder (NDM) and powdered whey beverages are available at the retail level in the United States and many other countries in unpackaged form. 10 cans (157 × 178 mm with a capacity of 3108 mL) in O2-reduced medium to extend shelf life (up to 54 months). Of the 10 US brands tested, there was a big difference in O2 clearance, seam quality, sensory quality, and vitamin A (with 6 out of 10 brands completely deficient in the vitamin). Aw of brands ranges from 0.14 to 0.28 (a typical range), corresponding to 3–5% humidity. The brand that scored the highest for general acceptance had an average O2 void of 7% and poor box seams, raising questions about the packaging's ability to maintain product quality over extended storage periods. . Aw of brands ranges from 0.14 to 0.28 (a typical range), corresponding to 3–5% humidity. The brand that scored the highest for general acceptance had an average O2 void of 7% and poor box seams, raising questions about the packaging's ability to maintain product quality over extended storage periods. . Aw of brands ranges from 0.14 to 0.28 (a typical range), corresponding to 3–5% humidity. The brand that scored the highest for general acceptance had an average O2 void of 7% and poor box seams, raising questions about the packaging's ability to maintain product quality over extended storage periods. .