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Plastic film maintenance method
In greenhouses, especially when growing flowers and vegetables, it's common for water droplets to form on the inner surface of regular plastic films. This happens due to the significant temperature difference between the inside and outside of the greenhouse. Even without special anti-drip films, moisture can accumulate over time, reducing the film’s transparency and affecting light penetration. As a result, the internal temperature drops, and the dripping water can lead to plant diseases. Studies show that water droplets on the film can reduce light transmission by up to 20% to 30%, which has a serious impact on crop growth.
If you don’t have access to a specialized drip-removing product, there are simple homemade solutions. One effective method is to mix 7.5 to 10 grams of finely ground soybean powder with 150 milliliters of water. Let it soak for two hours, then filter the mixture through fine gauze. Once ready, spray the solution evenly inside the greenhouse. The water droplets will quickly fall off, and the film will remain drip-free for about 15 to 20 days. This approach is easy, cost-effective, and safe for plants.
When the film gets damaged, it’s important to repair it promptly. For small holes, you can use a piece of thin plastic larger than the hole and apply a thin layer of water over the damaged area. Then press the two layers together to remove air bubbles. Another option is to use damp paper to cover minor tears; this can last for about 10 days. For more permanent fixes, mix white flour with water and add brown sugar equal to one-third the weight of the flour. Heat it slightly and use it as an adhesive to patch the film.
For larger tears or seams, you can use a similar film to cover the damaged area and secure it with a thin thread. If the film is thick, you can also use heat to fuse the edges. Clean the area, place a slightly larger piece of film over the hole, and cover it with 2–3 layers of newspaper. Gently iron along the edge to melt the film and make it stick once cooled. Alternatively, clean the hole and apply a special adhesive. After a few minutes, place a matching piece of film over it and let it dry completely.
To store the film properly, wash and dry it before folding and wrapping it in old plastic. Choose a location with moderate soil moisture, dig a small pit, and bury the wrapped film. Make sure the top of the film is at least 30 cm below the ground. This helps prevent aging, cracking, and reduces the risk of premature wear, ensuring the film lasts longer. Proper storage is key to maintaining the quality and effectiveness of agricultural films.