Why Do Epoxy Resin Acrylic Keychains Turn Yellow? A Better Alternative with CNC Chamfering
Many people like epoxy acrylic keychains because their surfaces are smooth and have a high gloss, looking as if they are coated with glass, adding a sense of liveliness to the acrylic keychains. However, the problem is that the epoxy resin yellowing over time, especially when exposed to high temperatures, direct sunlight, or oxidation, causing the color to darken and affecting the overall appearance gradually. This is also the biggest concern for many fans, merchants, and designers when customizing.
Why are Epoxy Resin Keychains Yellowing?
The main reason for the yellowing of the epoxy resin on the keychain is:
- Resin material characteristics - Ordinary epoxy resin tends to decompose under ultraviolet radiation and gradually turns yellow.
- Environmental impact - Direct sunlight, high temperatures, or humid conditions will accelerate aging.
- Long-term use – Over time, the surface of the epoxy application also tends to develop scratches and oxidation.
Therefore, although the resin application can give a beautiful luster, it is not the most durable option in the long run.
CNC Chamfering: The Best Alternative to Epoxy
If you want to achieve a three-dimensional glossy effect similar to epoxy resin, while avoiding yellowing issues, then what do you do?
The answer is - CNC cutting + chamfering process (CNC chamfering).
- Three-dimensional features: The chamfering can cause the acrylic edges to exhibit natural light refraction, giving the impression that a layer of transparent resin has been applied.
- Durability: The acrylic material itself will not turn yellow like resin, and remains clear and transparent for a long time.
- Texture Enhancement: Clear acrylic with a thickness of 3.5mm - 4mm, after undergoing CNC chamfering, will exhibit a texture similar to that of crystal.
- Environmental friendliness: Reduce the additional glue application process, making the production more environmentally friendly and with higher process consistency.
For example, Many anime accessories and K-pop accessories (such as anime acrylic keychains and K-pop acrylic charms) have already begun using CNC chamfering to replace the epoxy resin process, which is both convenient and durable.
How to Choose Between Epoxy and CNC Acrylic Keychain?
| Feature | Epoxy Resin Keychain (Epoxy Acrylic) | CNC Chamfered Acrylic Keychain (Chamfered Acrylic) |
|---|---|---|
| Appearance | Glossy and smooth to the touch | Crystal-clear and three-dimensional, like glass |
| Durability | Prone to yellowing, loses shine over time | Stays transparent for long-term use, resistant to discoloration |
| Cost | More complex materials and process, higher unit cost | Precision process, more stable overall |
| Recommended for | Users who want short-term glossy effects | Fans/brands who value long-lasting quality and durability |
While epoxy keychains may look shiny at first, CNC chamfered acrylic is a long-term investment in quality and aesthetics. Whether you’re an artist, a small business, or a fan looking for personalized merch, choosing the right production method ensures your keychains stay beautiful over time.
👉 Check out our full guide on custom acrylic keychains for beginners.
✨ Ready to make your own? Visit FableDots.com to get a free proof and start your custom acrylic keychain order today — even with no minimum order.