1. Physical protection
The food stored in the bag needs to avoid extrusion, impact, vibration, temperature difference and the like.
2. Shell protection
The outer casing separates food from oxygen, water vapor, stains, etc. Leakage is also a necessary factor in packaging design. Some packages include desiccants or deoxidizers to extend shelf life. Vacuum packaging or evacuating the air in the bag is also the main food packaging method. Keeping the food clean, fresh and safe during the shelf life is the primary function of the package.
3. Package or load the same package
Stuffing a small item of the same kind into a package is a good way to save volume. Powders and granular objects need to be packaged.
4. Communicate information
Packaging and labels tell people how to use, transport, recycle or treat packaging or food. This can be done by design.
Marketing often uses box labels to encourage potential buyers to buy goods. Packaging design has become a pivotal and ever-changing phenomenon for decades. Marketing communication and graphic design are applied to the outer box and the highlights of the sales show (for some reasons).
Packaging can play an important role in reducing transportation safety risks. The bag also prevents food from being returned to other items. Food packaging also reduces the likelihood of food being stolen. Some food packaging is very strong and has anti-counterfeiting labels to protect the interests of the business from loss. The bag can have a laser logo, special color, SMS authentication and other labels. In addition, in order to prevent theft, the retailer has an electronic surveillance label attached to the food packaging bag, and the consumer receives the outlet of the store for degaussing.