Hey there! I'm a supplier of film labelstocks, and I know how frustrating it can be when your labelstocks start to curl. Curling can mess up the application process and make your labels look less professional. But don't worry, I've got some tips on how to store film labelstocks to prevent curling.
Understanding Why Film Labelstocks Curl
Before we dive into the storage solutions, let's quickly understand why film labelstocks curl in the first place. The main culprit is the difference in moisture levels between the two sides of the labelstock. Film labelstocks are made up of different layers, and these layers can absorb or release moisture at different rates. When one side of the labelstock absorbs more moisture than the other, it expands, causing the labelstock to curl.
Another factor is temperature. Extreme temperatures can cause the labelstock to expand or contract unevenly, leading to curling. For example, if you store your labelstocks in a very hot and humid environment, the moisture can seep into the labelstock and cause it to curl. On the other hand, if it's too cold, the labelstock can become brittle and curl as well.
Ideal Storage Conditions
The key to preventing curling is to maintain a stable environment for your film labelstocks. Here are the ideal storage conditions:
Temperature
The temperature in your storage area should be between 68°F and 72°F (20°C - 22°C). This is a relatively stable temperature range that won't cause the labelstock to expand or contract too much. Avoid storing your labelstocks in areas that are exposed to direct sunlight or near heat sources like radiators or heaters. Sunlight can heat up the labelstock quickly, and heat sources can create hot spots in the storage area, leading to uneven temperature distribution.
Humidity
Humidity is just as important as temperature. The relative humidity in the storage area should be around 40% - 50%. This level of humidity helps to keep the moisture content in the labelstock balanced. If the humidity is too high, the labelstock will absorb moisture and curl. If it's too low, the labelstock will dry out and become brittle, also leading to curling. You can use a hygrometer to measure the humidity in your storage area and a dehumidifier or humidifier to adjust it if necessary.
Storage Location
Choose a storage location that is away from any sources of moisture, such as water pipes or leaky roofs. Also, make sure the area is well-ventilated to prevent the buildup of stale air and moisture. A storage room with proper insulation can help to maintain a stable temperature and humidity level. Avoid storing your labelstocks on the floor, as the floor can be colder and more prone to moisture. Instead, use shelves or racks to keep the labelstocks off the ground.
Proper Storage Methods
Now that you know the ideal storage conditions, let's talk about the proper storage methods for film labelstocks.
Roll Storage
Most film labelstocks come in rolls. When storing rolls, make sure they are stored horizontally. Storing rolls vertically can cause the weight of the roll to compress the labelstock at the bottom, leading to curling. Place the rolls on a flat surface, such as a shelf or a pallet. If you need to stack the rolls, make sure there is a flat and stable surface between each roll to prevent them from rolling or shifting.
It's also a good idea to cover the rolls with a protective material, such as a plastic sheet or a tarp. This can help to protect the labelstocks from dust, dirt, and moisture. Just make sure the covering is breathable to prevent the buildup of moisture inside.
Sheet Storage
If you have film labelstocks in sheet form, store them in a flat file or a storage box. Make sure the sheets are stacked neatly and evenly to prevent any pressure points that could cause curling. You can also place a piece of cardboard or a flat board on top of the sheets to keep them flat.
Handling During Storage
Proper handling during storage is also crucial to prevent curling. Here are some tips:
Avoid Overhandling
Try to minimize the amount of handling of the labelstocks. Every time you touch the labelstock, you transfer moisture and oils from your hands, which can affect the moisture balance of the labelstock. If you need to handle the labelstocks, make sure your hands are clean and dry.
Use the First-In, First-Out (FIFO) Method
When you receive new shipments of labelstocks, use the FIFO method. This means using the oldest labelstocks first. This helps to ensure that the labelstocks don't sit in storage for too long, which can increase the risk of curling.
Specific Considerations for Different Types of Film Labelstocks
Different types of film labelstocks may have slightly different storage requirements. For example, High Gloss BOPP Film Labelstocks and Matt BOPP Film Labelstocks are popular choices, and here are some specific considerations for them:
High Gloss BOPP Film Labelstocks
These labelstocks have a shiny surface, which can make them more sensitive to scratches and fingerprints. When storing them, make sure they are protected from any rough surfaces or objects that could scratch the surface. Also, because of their high gloss finish, they may be more prone to static buildup. You can use anti-static materials or treatments to reduce static and prevent the labelstocks from sticking together.
Matt BOPP Film Labelstocks
Matt BOPP film labelstocks have a more matte finish, which can make them less prone to showing scratches and fingerprints. However, they may be more sensitive to moisture absorption. Make sure to keep them in a well-controlled environment with the right humidity level to prevent curling.
Conclusion
Storing film labelstocks properly is essential to prevent curling and ensure the quality of your labels. By maintaining the ideal temperature and humidity, using the proper storage methods, and handling the labelstocks carefully, you can significantly reduce the risk of curling.
If you're in the market for high-quality film labelstocks, I'm here to help. Whether you need High Gloss BOPP Film Labelstocks or Matt BOPP Film Labelstocks, I can provide you with the best products and advice on storage and handling. Contact me to start a discussion about your labelstock needs and let's work together to find the perfect solution for your business.
References
- Packaging Machinery Manufacturers Institute (PMMI). "Best Practices for Label Storage."
- Label Industry Global (LIG). "Understanding Film Labelstock Properties and Storage."
