{"id":75168,"date":"2026-10-24T14:44:34","date_gmt":"2026-10-24T14:44:34","guid":{"rendered":"https:\/\/opackmakine.com\/?p=75168"},"modified":"2026-10-24T21:33:10","modified_gmt":"2026-10-24T21:33:10","slug":"modifiye-atmosfer-paketleme-map-nedir","status":"publish","type":"post","link":"https:\/\/opackmakine.com\/en\/modified-atmosphere-packaging-map\/","title":{"rendered":"What Is Modified Atmosphere Packaging (MAP)? Gas Mix Ratios by Product"},"content":{"rendered":"
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Modified atmosphere packaging (MAP)<\/strong> is a packaging method that extends the shelf life of food by replacing the air inside the package with a product-specific gas mixture. With the right gas ratio, the product lasts longer and keeps its color, texture and freshness.<\/p>\n\n\n\n

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What is Modified Atmosphere Packaging (MAP)?<\/strong><\/h2>\n\n\n\n
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In MAP, the product is placed in the package, the air inside is removed and replaced with a gas mixture containing carbon dioxide (CO\u2082), nitrogen (N\u2082) and, where needed, oxygen (O\u2082). The package is then sealed airtight. This slows down the causes of spoilage such as mold, oxidation and microbial growth.<\/p>\n\n\n\n

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An important feature of MAP is that there is no single \u201cright\u201d gas mixture. The atmosphere that suits cheese does not suit fresh meat. Bakery products face entirely different problems, such as pack collapse. This guide explains how MAP works, the role of each gas and the gas mixture ratios used for each product group.<\/p>\n\n\n\n

MAP is widely used especially in the following sectors:<\/p>\n\n\n\n

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  • Milk and Dairy Products<\/li>\n\n\n\n
  • Bakery Products<\/li>\n\n\n\n
  • Meat and Meat Products<\/li>\n\n\n\n
  • Ready-to-eat food products<\/li>\n\n\n\n
  • Sea products<\/li>\n\n\n\n
  • Liquid and flowable foods (yogurt, honey, jam, sauces)<\/li>\n\n\n\n
  • Dry food, fruit and vegetables<\/li>\n\n\n\n
  • Sterile medical products (thermoform packaging)<\/li>\n<\/ul>\n\n\n\n
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    How Does MAP Work? The Role of CO\u2082, N\u2082 and O\u2082<\/strong><\/h2>\n\n\n\n

    Three gases stand out in MAP, and each has a different job. The success of the mixture depends on balancing these gases correctly for the product.<\/p>\n\n\n\n

    Carbon dioxide (CO\u2082)<\/strong><\/h3>\n\n\n\n

    CO\u2082 is the main preservative gas that suppresses the growth of mold and microorganisms. In meat and meat products, the atmosphere must contain at least 20% CO\u2082 to inhibit microorganisms. In mold-prone products such as cheese, the ratio is much higher.<\/p>\n\n\n\n

    CO\u2082 has two drawbacks. First, it dissolves in water and in the product. When the CO\u2082 in the headspace passes into the product, the pressure inside the package drops and the package collapses or shrinks. Second, when used alone in meat products, it can cause discoloration.<\/p>\n\n\n\n

    Nitrogen (N\u2082)<\/strong><\/h3>\n\n\n\n

    N\u2082 is an inert filler gas that is not absorbed by the product or the packaging. It prevents the package from collapsing and removes oxygen from the environment. It is the main component of the mixture in products such as yogurt. In meat products, an N\u2082 atmosphere leads to less drip loss than vacuum packaging.<\/p>\n\n\n\n

    Oxygen (O\u2082)<\/strong><\/h3>\n\n\n\n

    O\u2082 is removed from the environment in most products because it causes oxidation and aerobic spoilage. Even so, it is used deliberately in some products. Fresh red meat mixtures contain a high proportion of O\u2082. In sea products, having some O\u2082 in the package atmosphere is important to prevent risks such as botulism.<\/p>\n\n\n\n

    The difference between MAP and vacuum packaging<\/strong><\/h3>\n\n\n\n

    In vacuum packaging, the air is drawn out of the package and no gas is added. In MAP, after the air is removed, the package is filled with a gas mixture suited to the product. In some applications the two are used together. For example, in dairy products, oxygen is first reduced by vacuum before packaging, and then the appropriate atmosphere is created.<\/p>\n\n\n\n

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