Why do vacuum packaging bags turn yellow and discolored? How to avoid yellowing of vacuum packaging bags?

Recently, during communication with customers, Jinde Packaging customer service personnel have found that many customers are troubled by the problem of yellowing and discoloration of vacuum packaging bags after a period of time. In some industries, especially the food industry, once the packaging changes color, customers will also think that the food has deteriorated. So, why does vacuum packaging bags undergo color changes? How can we prevent the color of vacuum packaging bags from changing? Jinde Packaging has provided an answer based on customer feedback and technical factors
Generally speaking, the color change of vacuum packaging bags is usually caused by the following factors:
1. Material selection: Different packaging bag materials may undergo color changes during the vacuum packaging process. For example, some plastic materials may fade or turn yellow under high temperature or pressure.
2. Temperature and pressure: During the vacuum packaging process, the temperature and pressure inside the bag will change. These changes may cause a change in the color of the packaging bag.
3. Food ingredients: Certain components in food, such as oxides or acidic substances, may react with the packaging materials, causing color changes.
So, how can we avoid color changes in packaging bags?, We can consider the following methods:
1. Choose high-quality materials: Choose high-quality materials suitable for vacuum packaging, which have good high temperature and pressure resistance, reducing the possibility of color changes.
2. Control vacuum packaging conditions: Try to control the temperature and pressure of the vacuum packaging as much as possible, avoiding situations where it is too high or too low, in order to reduce the impact on the color of the packaging bag.
3. Avoid foods that may react with the packaging bag: For foods that may cause discoloration of the packaging bag, other types of packaging materials or other preservation measures such as adding food preservatives can be considered.
Overall, selecting suitable materials, controlling vacuum packaging conditions, and avoiding reactions with foods that may cause discoloration can help reduce the possibility of color changes in vacuum packaging bags.
Jinde Packaging has been focusing on the production and research and development of vacuum packaging bags for 11 years. We can provide customers with a one-stop service of vacuum packaging bag design, printing, lamination, curing, slitting, bag making, quality inspection, finished products, and delivery. The product has successively obtained multiple certification qualifications such as FDA certification, ISO certification, SGS certification, MA product certification, etc. It can produce more than 500000 pieces per day and sell more than 13000 tons annually. It is a top supplier for Taobao stores and a SKA merchant for Alibaba. Service Hotline: 15902743510