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What are the purpose of baking food packaging?

Update:Sep 18,2017
Summary:

    When the bread, the central part of the cake cooled […]

    When the bread, the central part of the cake cooled to 35 degrees Celsius, should be immediately packaged. Such as continued exposure to the air for a long time, will make bread and other products easy to aging, infection mold, water loss is too large, affecting the flavor.
1, to prevent pollution and mildew
   Bread as a direct consumption of food, requiring clean health, to prevent the storage, transportation, sales process contaminated dirt and fungi; bread skin moisture is generally about 12 to 16%, if the temperature and humidity appropriate, and fungal infection, Is easy to moldy food. Although in recent years, some manufacturers in the summer to add fungicides and other measures to prevent moldy, but if not properly packaged, or can not avoid mildew phenomenon. The finished product after packaging prevents infection when it comes into contact with air, containers, hands, and prolongs the shelf life. If the application of anti-mildew agent in the formula, but also the use of better waterproof packaging materials, experiments show that the temperature of 32 to 35 degrees Celsius, 90% relative humidity can be stored for half a month; no fungicide bread, Good packaging for 7 days. But under the same conditions, such as no bread can only be stored for 2 days, showing the importance of packaging on the mildew.
2, delayed product aging
   Starch aging after the bread dry and dry, the core inelastic, sliced when prone to broken crumbs. This will affect the flavor and reduce the body's digestion and absorption rate. Aging is an inevitable trend in bread storage, but the packaged product can delay the aging effect, the reason is that the bread is in a relatively constant state of the preservation, not easy to dehydration, delayed starch colloid water phase separation, colloidal water Is an important reason for aging.
   3, to prevent damage
   Bread in the storage, transportation and sales are not only possible pollution, but also the defects of the defects. Especially the texture is relatively soft or the surface of the slurry slurry products more prone to use thin film packaging bread, to avoid friction between each other, resulting in broken, but also play a role in shock absorption, to prevent the collision, damage the appearance of integrity. For products that are more likely to be flattened or coated on the surface, use a transparent plastic tray to protect the film.
   4, beautify the goods, improve the value
   After the packaging of the product, because of the new and colorful patterns and very eye-catching, so that goods beautify, improve product grade. Packaging can also promote the nutritional characteristics of the product, it can be said that packaging is also a form of advertising.

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