1. Bubble Formation
Issue:
Bubbles can form when applying or pouring UV resin, affecting the transparency and appearance of the finished product.
Solutions:
Avoid Rapid Stirring: Minimize stirring or avoid it altogether to reduce bubble formation.
Use a Heat Gun: Blow gently with a heat gun on the surface before curing to eliminate surface bubbles.
Light Heating: Slightly heat the resin to help bubbles rise to the surface, but avoid overheating.
2. Incomplete Curing
Issue:
Incomplete curing can leave a sticky surface or insufficient hardness, usually due to insufficient UV light exposure or resin layers that are too thick.
Solutions:
Increase Exposure Time: If curing is incomplete, extend the UV lamp exposure time to ensure full curing.
Layered Curing: For thicker items, apply resin in thin layers and cure each layer individually to ensure complete curing.
Check UV Lamp Power: Ensure you’re using a sufficiently powered UV lamp, typically 36W or higher, or choose a UV resin that matches your lamp for optimal curing results.
3. Surface Shrinkage or Unevenness
Issue: UV resin may shrink slightly during curing, which can lead to surface unevenness or separation from mold edges.
Solutions:
Thin Layer Applications: Apply UV resin in multiple thin layers to minimize shrinkage effects.
Add Extra Resin: Add a bit more resin to prevent depressions and ensure even coverage.
4. Yellowing Issues
Issue: UV resin can turn yellow over time when exposed to sunlight or prolonged UV exposure.
Solutions:
Add UV Stabilizers: Use UV resin with UV stabilizers to delay yellowing.
Avoid Direct Sunlight: Keep the finished product in shaded areas to minimize UV exposure, ideally placing it indoors.
5. Sticking or Demolding Difficulties
Issue: UV resin may stick to the mold after curing, making it hard to demold and potentially damaging the mold or piece.
Solutions:
Use a Mold Release Agent: Apply a mold release agent on the mold’s inner surface to make demolding easier.
Choose Silicone Molds: Silicone molds are more flexible, easing the demolding process.
Wait Before Demolding: Allow full curing before attempting to demold to ensure complete hardening.
6. Sticky Surface
Issue: Sometimes, UV resin can have a sticky surface after curing, often due to insufficient light exposure or the resin’s composition.
Solutions:
Additional UV Exposure: If stickiness occurs, expose the item to UV light again, which often removes the tackiness.
Apply a Clear Coat or Sealer: Apply a clear coat or sealer on top to eliminate stickiness and add gloss to the surface.
