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For deeply yellowed items, repeat the treatment multiple times across several days.
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If sunlight is unavailable, a UV lamp or blacklight can be used to activate the peroxide.
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Commercial plastic restorers like RetroBright use a similar principle and can be used as a ready-made alternative.
Frequently Asked Questions:
Q: Why does plastic turn yellow in the first place?
A: Plastic turns yellow due to a chemical reaction called photo-oxidation, often triggered by heat, UV light, and age.
Q: Will this method work on colored plastic?
A: No. This method is best used on white or light-colored plastics, as it may discolor or fade colored items.
Q: Is it safe to use hydrogen peroxide on appliances?
A: Yes, 3% hydrogen peroxide is safe for most surfaces, but avoid contact with electronics and always do a spot test first.
Q: How often should I whiten my plastic parts?
A: Depending on your environment, you may need to repeat the process once every 6–12 months to keep plastics bright.
With just a few common household items and some sunshine, you can breathe new life into your appliances and enjoy that clean, crisp look once again.
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