Every craft maker eventually hits the same wall: a project calls for a clear, hard, glass-like finish, and the two candidate materials — UV resin and two-part epoxy — behave so differently in practice that picking wrong means redoing the piece. Here are the specific questions that come up most.

Q: I’m making resin coasters with dried flowers pressed flat inside. Which resin?

Epoxy for anything beyond a very thin coaster. A standard coaster thickness exceeds UV resin’s practical per-layer cure depth of roughly 3–5mm, meaning a UV approach requires several sequential thin pours with a cure step between each — workable, but slower and more labor-intensive than a single self-leveling epoxy pour that fills the whole mold in one step and cures overnight.

Q: I want to encapsulate a photo inside a resin pendant without the image shifting during cure. What controls that?

UV resin is the stronger choice here specifically because of its on-demand cure — you can lay the photo, check its position and orientation under normal light, adjust if it’s crooked, and only trigger the cure once satisfied. Epoxy begins curing the moment it’s mixed, and a photo can drift slightly as the resin settles and levels before it gels, which shows up as a slightly off-center image in the finished piece.

Q: I’m building a large resin art panel with swirled pigment colors. Does layer thickness matter here too?

Yes, and this is squarely epoxy’s territory. Large panels require deep, single-pour capability that UV resin’s shallow cure depth can’t match, and epoxy’s slower cure gives pigments time to swirl and blend naturally under gravity before the material sets — an effect that’s difficult to replicate with UV resin’s near-instant cure, which locks colors in place the moment the lamp is triggered.

Q: My glitter keeps settling to the bottom of my UV resin bezel before I can cure it. What’s going on?

This is a viscosity and cure-timing issue, not a material defect. Low-viscosity UV resin gives glitter and fine inclusions time to sink before the lamp is applied if there’s any delay between placement and cure. The fix is triggering the cure promptly after arranging inclusions, or working in thinner layers so gravity has less time to act before each layer locks in place — building the piece up gradually rather than trying to suspend everything in one pour.

Q: Can I mix opaque pigment into UV resin the same way I would with epoxy?

Only with real limitations. UV resin depends on light penetrating the resin to trigger cure, so heavily pigmented or opaque UV resin can fail to cure through its own thickness — the surface hardens while material beneath stays liquid. Epoxy has no such constraint, since its cure is a chemical reaction independent of light exposure, making it the more reliable choice whenever a project calls for solid, non-transparent color mixed throughout a deeper pour.

Q: How do I stop my epoxy pour from yellowing months later?

Standard aromatic epoxy formulations yellow under UV exposure over time, which is a common disappointment for craft pieces displayed near a window. Formulations specifically marketed as non-yellowing or UV-resistant use an aliphatic hardener system instead, and that’s the category to look for on a product label if the finished piece will see regular sunlight exposure.

Q: My epoxy pour has a layer of tiny bubbles trapped near the surface. How do I fix that on my next piece?

Air introduced during mixing is nearly unavoidable, but a brief, careful pass with a heat gun or butane torch immediately after pouring releases surface tension and lets trapped bubbles escape before the epoxy begins to gel. Waiting too long after pouring to do this pass is the most common reason it doesn’t fully work — the window closes as the resin starts to thicken.

Q: Does my workshop temperature actually change how my epoxy behaves?

Meaningfully, yes. Epoxy resin performs best in the 18–24°C range for proper flow and self-leveling; a cold workshop slows cure dramatically and can leave a pour under-cured or tacky for far longer than expected, while a warm room accelerates cure and shortens the working time available to manipulate pigments or inclusions before the material starts to set.

Q: I’m scaling from one-off pieces to small-batch production. What actually needs to change?

Cure consistency, more than material choice. A handheld UV flashlight is fine for occasional single pieces, but a maker producing repeatable batches needs the same intensity, distance, and exposure time on every piece — variables a handheld tool can’t reliably control. A dedicated benchtop UV curing lamp with a fixed working distance and timer removes that operator variability; see Incure’s L-Series™ UV LED flood lamp guide for how curing area and intensity requirements scale from single-piece hobby work to small production runs. Email Us with your typical piece size and batch volume if you’re evaluating the move from handheld to benchtop equipment.

Q: Is one system simply “better” than the other for craft work?

No — they solve different problems. For a fuller side-by-side comparison across common craft project types, our companion piece on UV glue vs epoxy for craft resin projects breaks down where each system fits by depth, turnaround time, and inclusion type. For structural, non-decorative bonding decisions beyond craft resin work, UV glue vs epoxy for transparent bonding covers that separate use case.

Incure’s resin and adhesive product range includes formulations suited to craft production environments at any scale. Contact Our Team for product recommendations tailored to your project type.

Visit www.incurelab.com for more information.