Don’t panic! This is a really common issue with UV resin. It usually it comes down to a few fixable causes. Here’s a checklist to troubleshoot why your UV resin isn’t curing:

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🔍 Why UV Resin Won’t Cure (and how to fix it)

1. ❌ Resin Layer Too Thick

• UV resin only cures well in thin layers (1–3 mm max).
• If it’s too thick, the top might cure but the inside stays liquid.
  ✅ Fix: Work in thin layers, curing each one before adding the next.

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2. ❌ Weak or Wrong Light Source

• Not all UV lamps are strong enough. Weak desk lamps or cheap UV lights can fail.
• UV resin usually cures best with 365–405 nm UV light, 36W or higher.
  ✅ Fix: Use a nail lamp, curing lamp, or UV flashlight designed for resin.

The UV JDiction Lamp is high powered, re-chargeable (meaning its wireless) and double sided. Check it out on Amazon here.

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3. ❌ Not Enough Curing Time

• Some resins need 2–5 minutes per layer (or more for darker pigments).
  ✅ Fix: Increase curing time, and rotate the piece to expose all sides.
• TIP: Always check the instructions for your chosen brand.

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4. ❌ Too Much Color or Additives

• Dark pigments, opaque dyes, or lots of glitter block UV penetration.
  ✅ Fix: Use only a small amount of color, or cure longer/thinner layers. Try using lighter translucent colours.

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5. ❌ Wrong Surface or Mold

• Opaque or colored molds (like solid silicone) block UV light.
  ✅ Fix: Use clear silicone molds for UV resin projects.

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6. ❌ Resin Quality or Storage

• Old, expired, or improperly stored resin may not cure.
• Exposure to heat or light in storage can ruin it.
  ✅ Fix: Always store in a cool, dark place, tightly sealed.

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🛠 Quick Fix for Tacky or Uncured Resin

• Wipe sticky surfaces with isopropyl alcohol to remove residue.
• Apply a thin clear coat of UV resin on top, then cure again under a strong lamp.
• If the inside is liquid, scrape it out and re-pour in thinner layers.

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