38°C
September 18, 2026
img
Resin Craft

Beginner Guide to Casting Resin Jewellery Safely

Sep 13, 2026

Why Resin Jewellery Is a Lovely First Project

Casting resin is one of the most satisfying crafts a maker can pick up. A single batch of epoxy can become pendants, stud earrings, rings, keyrings and hair clips, all within a couple of days, and the results look far more expensive than they cost. You get to play with colour, sparkle and real botanicals, and there is something quietly magical about watching a liquid turn into a glossy, glass-like solid overnight.

What takes people by surprise is that resin is a chemical reaction, not a craft material like clay or wool. That is not a reason to avoid it, but it is a reason to slow down at the start. Epoxy can also trigger skin sensitivity over time, so the habits you build in your first week are the ones that will keep you making for years. Get the basics right and you will have a hobby that stays fun.

Set Up a Well-Ventilated Workspace

Choose your room before you choose your moulds. A spare bedroom, utility room, garage or shed with an opening window is ideal. Please avoid the kitchen and dining table: resin spills are almost impossible to remove from wood and fabric, and you do not want uncured resin anywhere near food preparation. A dedicated folding table in a corner of a well-aired room is far safer.

Ventilation means moving air, not just an open window. Position yourself between the window and a fan that points outwards, so fumes are pulled away from your face rather than blown across the room. If the weather allows, work with the door open too for a cross-breeze. Aim for a stable room temperature of around 20 to 25°C; cold rooms make resin thick, slow to cure and prone to trapped bubbles.

Cover your surface with a silicone mat or thick plastic sheeting, and keep a roll of kitchen paper and a bin bag within reach. Set everything on a lipped tray so a tipped cup stays contained. Finally, keep pets and small children out of the room while you work, and never leave mixed resin unattended.

Protect Your Hands, Eyes and Lungs

Nitrile gloves are non-negotiable. Latex lets resin molecules through, so a box of powder-free nitrile gloves is one of the best small investments you can make. Change them the moment they feel sticky or torn, and keep a second pair handy for the finishing stages.

Add safety glasses for pouring and sanding, a long-sleeved shirt or apron to protect your forearms, and a dust mask for any sanding work later on. If you wear contact lenses, consider swapping to glasses on making days, as fumes can irritate lenses. Your starter kit should include:

  • Two-part epoxy resin with clear instructions
  • Silicone moulds in simple shapes such as circles and ovals
  • Graduated measuring cups or digital scales accurate to 0.1g
  • Wooden stirrers, cocktail sticks and small mixing cups
  • Mica powders, resin dye, fine glitter and dried flowers
  • Wet-and-dry sandpaper in 400 to 2000 grit, plus polishing compound

Measure and Mix Like You Mean It

This is the step where most first attempts fail, and it is entirely avoidable. Read your resin's instructions and follow the ratio exactly, whether it is by volume or by weight. Never guess, and never top up one part with a splash of the other to use up leftovers; the chemistry will not forgive you.

Pour part A and part B into separate cups first, then combine them in a clean one. Stir slowly and steadily for the full time stated, usually around three minutes, scraping the sides and the bottom of the cup as you go. Then pour the mixture into a second clean cup and stir again with a fresh stick for another minute. This two-cup method catches the unmixed resin that clings to the first cup, which is what leaves pieces permanently tacky. Stir slowly to avoid whipping in air.

Add Colour, Glitter and Dried Flowers

Once your resin is fully mixed, split it into smaller cups and colour each one separately. Pigments are powerful, so start with a tip-of-a-cocktail-stick amount and build up. Keep the total added pigment below about six per cent of the resin volume, or the cure will suffer. Mica powders give a shimmer, liquid dyes give deep translucent colour, and fine glitter suspends beautifully while chunky glitter sinks to the bottom.

Dried flowers need to be bone dry. Press them for at least two weeks, then seal them by painting a thin layer of clear resin over each bloom and letting it cure before embedding. Skip this and trapped moisture will show as a cloudy halo. If you spot bubbles after pouring, let the cup rest for ten minutes before use, then pass a heat gun quickly over the surface of the mould, or a lighter flame for a second or two. Do not linger, as resin scorches easily.

Pouring, Curing and Finishing

Pour in a slow, thin stream into one corner of the mould and let the resin flow around your inclusions rather than pouring directly onto them. Fill to just below the rim and leave the moulds somewhere level, dust-free and undisturbed. A plastic tub placed over them keeps fluff out. Most pieces demould after 24 hours, but leave them a full three days before sanding.

Sand wet, over a bowl of water, working up through the grits from 400 to 2000, then buff with polishing compound and a soft cloth. Wear your dust mask and glasses. If a piece is still tacky after two days, it was measured incorrectly, so accept the loss and start again with a fresh batch.