lesson 12

lesson 12 - 1. Function of food packaging a. Main purpose:...

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1. Function of food packaging a. Main purpose: to physically protect the product during transport and handling. b. The package also acts as a barrier against potential spoilage agents (chemicals, moisture, microorganisms) and general filth. i. Examples: 1. The vitamins and lipid in milk are susceptible to light; therefore, a package that provides a light barrier is necessary. Packaging materials protect the quality of milk to varying degrees. Clear glass is a poor packaging material for milk products. The best quality will be maintained if milk is packaged in either a paperboard carton or an opaque jug. [Most milk is sold in semi- opaque jugs that will work as packaging material, but aren’t the best for quality.] 2. Potato chips are sensitive to air because the oxygen in the air can react with the lipid and cause rancidity. The bags containing potato chips are made of materials with oxygen-barrier properties c. Other uses of Food packaging i. Containment for shipping and handling 1. Some packaging is minimal: netting sold around oranges 2. For orange juice, a substantial package is needed (carton) ii. Dispensing 1. The orange juice carton provides a great opportunity to look at packages having the functionality of dispensing. 2. Many of you may be too young to remember milk cartons or juice cartons where you actually had to peel back the paperboard to open the top. Now, juice containers and some dairy beverage containers come with handy pour spouts that make dispensing even easier. iii. Unitizing into appropriate sizes 1. Foods from meats to spices are shipped in bulk 2. This large volume is repackaged into a size that it is appealing to today’s consumer iv. Improving the usefulness of the product 1. a box of cake mix is all-inclusive, including most of the ingredients as well as a written recipe and cooking instructions v. Most important from a food industry standpoint, the package serves as a vehicle through which the manufacturer can communicate with the consumer. Nutritional information ingredients and often recipes are found on a food label. The package is also utilized as a marketing tool designed to attract your attention at the store. 2. Basic packaging materials a. Early forms: gourds to sea shells to animal skin. Later came pottery, cloth and wooden containers. These packages were created to facilitate transportation and trade. b. Today foods are packaged in a wide variety of materials i. Metal- strong and a good overall barrier, but heavy and prone to corrosion. ii. Paper - economical and has good printing properties; however, it is not strong and it absorbs water unless it is coated with foil, wax or plastic. iii. Glass - transparent, which allows the consumer to see the product, but breakable. Unlike metal, glass is inert and will not react with the food, but the transparency of
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lesson 12 - 1. Function of food packaging a. Main purpose:...

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