If you use your smartphone case for a long time, have you noticed that it has started to yellow and become dirty? This problem is especially noticeable with transparent smartphone cases. However, by knowing the proper care methods and choosing the right material, you can keep your phone looking beautiful for a long time. In this article, we'll explain the causes of yellowing in smartphone cases and how to easily remove dirt.
What causes smartphone cases to turn yellow?
It's actually quite common for smartphone cases to turn yellow. If you use your phone for a long time, your clear phone case may turn yellowish without you even noticing. There are several factors that contribute to this.
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Effects of ultraviolet ( UV ) light
When you use your smartphone every day, it is often exposed to sunlight. When this ultraviolet light hits your smartphone case, it can gradually discolor and yellow, especially if the case is made of clear plastic or TPU (a soft material).
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Effects of sweaty hands and oily hands
Since we carry our smartphones in our hands every day, sweat and oils are bound to get on them. This buildup can cause the smartphone case to become dull and yellow.
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surrounding dirt
Since we often carry our smartphones around, dust and dirt from the air can easily get on the case, which can cause yellowing, especially in humid environments.
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Effects of cosmetics and creams
Hand cream and makeup can get on your phone case, which can also cause yellowing. Plastic cases are especially susceptible to these chemicals.
Once you understand the cause of yellowing, it becomes easier to take measures to prevent it. In the next section, we'll take a closer look at the materials used in smartphone cases.
What are the most common materials used for smartphone cases?
The durability, feel, and resistance to yellowing and staining of smartphone cases vary greatly depending on the material used. Below, we will take a closer look at the characteristics of each material and its resistance to yellowing and staining.
Plastic cases are characterized by their lightweight yet high strength. Polycarbonate (PC) and ABS resin, in particular, are widely used as materials that are shock-resistant and provide excellent protection for smartphones. However, transparent plastic cases can oxidize when exposed to UV rays and hand sweat, causing noticeable yellowing within a short period of time. To prevent yellowing, you need a case with UV coating and regular maintenance. It's also important to note that plastic is prone to static electricity, making it prone to attracting dust and dirt.
TPU cases are highly flexible and excellent at protecting smartphones from impacts. They're especially popular among those who prioritize durability, as they offer cushioning against drops and other impacts. However, transparent TPU is vulnerable to UV rays and chemicals and tends to yellow over time. Some manufacturers use TPU with anti-yellowing treatment, so choosing a product with this anti-yellowing treatment will help keep your phone clear for a long time. Furthermore, TPU easily absorbs oils and dirt, so regular cleaning is necessary for those who are concerned about hand sweat and sebum.
Silicone is soft and non-slip. It also has excellent shock absorption when dropped, making it popular with children and people with slippery hands. However, its softness means that dust and dirt easily adhere to the surface, making it prone to darkening and staining over time. Silicone itself is relatively resistant to yellowing, but cleaning can become difficult if dirt builds up. In such cases, it is effective to use a special cleaning agent and soft cloth.
Leather cases are appealing because of their luxurious feel and texture, and genuine leather in particular has the characteristic of improving its patina over time. However, leather is very sensitive to moisture and dirt, and can discolor due to sweat and sebum in particular. While it is less likely to yellow, it does require regular moisturizing and cleaning, and it is recommended to take good care of it using specialized care products. Synthetic leather is easier to maintain than genuine leather, but it can crack over time, so care must be taken when choosing the material.
How to remove yellowing and dirt from plastic smartphone cases
Plastic smartphone cases are light and durable, but over time they inevitably become yellowed and dirty. However, if you know the proper care methods, you can effectively remove the yellowing and extend the life of your case. Here we will introduce specific methods for removing yellowing and dirt.
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Cleaning with baking soda and water
Baking soda is a common household cleaning product and is also effective for removing yellowing from plastic. Dissolve baking soda in water to make a paste, then gently scrub the yellowed areas of the case with a soft cloth or toothbrush. Leave it for a few minutes, then rinse thoroughly with water. Baking soda also has bleaching properties, which can help remove stubborn yellowing. -
Wipe with alcohol or disinfectant wipes
If the stains are caused by sweat or oil from your hands, they can be easily wiped away with alcohol or a disinfectant wipe containing alcohol. Since sebum stains tend to remain on the surface of transparent plastic cases in particular, it is important to regularly clean the surface with alcohol. Alcohol also has a disinfecting effect, so it has the advantage of disinfecting the surface while removing the stains. -
How to use bleach
For severe yellowing, using bleach is also effective. Mix a few drops of bleach with water, soak the case for a few minutes, then rinse with water. However, when using bleach, be sure to check beforehand whether it will damage the material. If the bleach is too strong, it may deteriorate the plastic, so be careful about how often and at what concentration you use it. -
UV protection and storage location
To prevent yellowing, it's also important to avoid direct sunlight. Plastic cases are sensitive to ultraviolet rays, so leaving them in direct sunlight for long periods of time can cause oxidation and lead to yellowing. When you're not using your smartphone, try to store it in a bag, drawer, or other place that blocks sunlight. It's also effective to use a UV-blocking spray to protect it from UV rays.
What are the recommended smartphone cases that don't yellow easily?
To prevent yellowing, it's important to first choose the right material. TPU material is particularly soft and has excellent shock absorption. Choosing a TPU case with an anti-yellowing coating can help prevent discoloration caused by UV rays and sweaty hands. It's a good idea to check the product information and choose a smartphone case with UV protection or high ratings.
Polycarbonate cases are transparent and resistant to UV rays. They are chosen by many users because they do not yellow easily. In particular, cases with UV protection can prevent oxidation caused by sunlight and maintain their transparency for a long time.
Don't forget about daily maintenance. Accumulation of sweat, sebum, and dirt from your hands can cause yellowing, so make it a habit to regularly wipe it with alcohol or a cleaning cloth. Also, keeping it out of direct sunlight when not in use will help prevent yellowing.
TORRAS's recommended points
If you're struggling to choose a smartphone case, consider TORRAS 's high-quality cases, known for their durability and functionality. TORRAS cases are designed not only for aesthetics but also for practicality, resulting in many products you can enjoy for years to come. The transparent cases, in particular, feature TORRAS's proprietary Transternity® anti-yellowing technology, which prevents yellowing caused by UV rays and hand sweat for up to one year. The case's surface is also coated with PU oil, effectively insulating it from dirt and oily hands and further preventing yellowing. This ensures the case's transparency lasts longer while maintaining its beautiful appearance. For those looking for a transparent case, TORRAS is an ideal choice. For screen protection, we recommend using a matching glass screen protector .
summary
To prevent your smartphone case from yellowing or becoming dirty, the key is to first select the right material and perform regular maintenance. If you choose a transparent case, we recommend one with UV protection or anti-yellowing technology. Furthermore, by making it a habit to regularly clean it with simple methods, such as using alcohol or baking soda, you can keep it looking beautiful for a long time. With a little ingenuity and care, you can maintain the appearance of your smartphone case and make daily use even more comfortable.
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