Ivan
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Most transparent phone cases are made from a plastic called Thermoplastic Polyurethane (TPU). Manufacturers use TPU because it’s flexible, shock-absorbing, cheap to produce, and good at protecting phones from drops. It’s a very practical material.
But TPU has a weakness: it naturally oxidizes over time.
When the case is exposed to UV light, heat, oxygen, and oils from your hands, chemical reactions slowly happen in the polymer chains. These reactions change the way the material absorbs and reflects light, which is what causes the yellow or brown tint you eventually see.
Even if you kept the case perfectly clean, it would still slowly yellow because the process happens inside the material itself.
Manufacturers do try to slow this down. Many cases include UV stabilizers and anti-oxidation additives, but these only delay the reaction; they don’t stop it completely.
Another material that stays clear longer is Polycarbonate, which is used in harder transparent cases. Polycarbonate resists yellowing better, but it has its own trade-offs: it’s more rigid, cracks easier under impact, and doesn’t absorb shocks as well as TPU.
So companies usually combine materials:
a polycarbonate back for clarity and TPU edges for drop protection. Ironically, the part that usually turns yellow first is the TPU bumper around the edges.
In other words, it’s not that engineers “can’t” make anti-yellow transparent cases. They can but those materials would either be more expensive, more brittle, or worse at protecting your phone.
Bhuvan@Bhuvan_RJ46
We are in 2026, an era of rapid innovation but we still can't make anti-yellow soft transparent cases.
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@MouinRabbani Israel needs its navy in the Mediterranean in case Greta Thunberg turns up with her Freedom Flotilla.
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@perogeremmer mas mau tanya dong kenapa istilahnya vibe coding? awal mula istilah itu dari mana?
Indonesia

Software engineer experienced vibe coding, hasilnya masterpiece.
Anak kuliahan IT vibe coding, hasilnya juga bisa jadi masterpiece.
Yang bikin beda apa? problem solving dan kemampuan memahami kode yang ditulis AI 😌
Yang satu maki-maki AI karena nulisnya gak jelas, yang satu memuja AI karena nyelesain masalah mereka (masalah sebenernya yang gabisa coding).
R 🦇🔊@agro5d
Sebagai fotografer & software engineer aku nyoba bikin AI assistant pake vibe coding, hasilnya bisa ketemu model Jepang tiap hari. Kadang 3 dalam sehari. Cek @aophotojp buat foto2nya (ongoing) Ada yg tertarik deep dive teknisnya 👀? (can be applied to many things) #pamerajadulu
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