You can whiten yellowed plastic on appliances using methods like a cream peroxide treatment with sun exposure or a natural vinegar cleaning solution.
Yellowing plastic on appliances is a common issue, often caused by exposure to UV light, heat, and breakdown of flame retardants (a process called "bromine bleed"). Fortunately, several methods can help restore their original appearance. Two effective approaches include using a cream peroxide mixture activated by sunlight and a simple homemade vinegar solution.
Effective Methods for Whitening Yellowed Plastic
Based on common practices and the provided reference, here are methods to address yellowing:
1. Cream Peroxide and Sunlight Treatment
This method is particularly effective for severe yellowing and utilizes the power of oxidation and UV light.
- Process: Apply cream peroxide (often used in hair bleaching, typically 40 vol or 12%) directly onto the yellowed plastic surface of the appliance. Ensure the plastic is clean before application.
- Activation: Keep the appliance (or the treated part if removable) in direct sunshine for 3 to 4 hours. The UV rays from the sun accelerate the bleaching action of the peroxide, helping to break down the yellowed compounds in the plastic.
- Safety: Wear gloves when handling cream peroxide and avoid contact with skin and eyes. Work in a well-ventilated area.
- After Treatment: Thoroughly rinse the plastic with water to remove all peroxide residue. Repeat if necessary, but be mindful of potential damage to the plastic with excessive treatment.
Important Note: This technique, often referred to as "Retrobrighting," is widely used for restoring vintage plastics but requires caution.
2. Natural Vinegar Cleaning Solution
For lighter yellowing or as a gentle cleaning option, a vinegar solution is a good choice.
- Preparation: A natural vinegar cleaning solution is another option. To make the solution, fill a jar halfway with your solution by combining equal parts white vinegar and water. For instance, mix 1 cup of white vinegar with 1 cup of water.
- Enhancement: Feel free to add essential oils like lavender, lemon, or citrus. While these don't aid in whitening, they help mask the strong vinegar smell and leave a pleasant scent.
- Application: Apply the solution to the yellowed plastic using a cloth or sponge. For smaller items, you might soak them in the solution.
- Action: Let the solution sit on the surface for some time (e.g., 30 minutes to an hour) before wiping it clean. This method is less aggressive than peroxide and may require repeated applications for noticeable results.
Comparing the Methods
Here's a quick comparison of the two approaches:
| Method | Effectiveness (Yellowing Level) | Time Required | Complexity | Ingredients |
|---|---|---|---|---|
| Cream Peroxide + Sunlight | Severe Yellowing | Hours | Moderate | Cream Peroxide, Sunlight |
| Vinegar Cleaning Solution | Light Yellowing | Shorter contact time | Simple | White Vinegar, Water, Optional Oils |
Choose the method based on the severity of the yellowing and your comfort level with the chemicals involved. Always test any solution on an inconspicuous area first.
