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Q1 : Will all epoxy resins will eventually yellow over time?
So Yes — all epoxy resins will eventually yellow over time, no matter the brand.
Here’s why:
Causes of Yellowing
UV light exposure – Sunlight is the main factor that breaks down resin over time.
Oxidation – Even in storage, resins can slowly discolor due to air exposure.
Heat – High temperatures speed up the process.
How Long Before Yellowing Shows
Premium brands like ArtResin or EX-74 are formulated with UV stabilizers and tend to stay clear for several years before noticeable changes.
Cheaper resins may yellow much faster (sometimes within months).
What You Can Do
Keep resin artwork out of direct sunlight.
Use UV-protective coatings or sprays.
Choose high-quality resins (like the ones you mentioned) for slower yellowing.
So yes, they do get yellowish after years, but good resins will stay clear longer. |
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