Every resin crafter in India has faced this moment: you pour a beautiful layer of glitter or metallic flakes into your epoxy, step away for an hour, and come back to find everything has settled to the bottom of the mould. The top looks clear and flat. The sparkle is gone β or rather, it's all hiding underneath. This is one of the most common frustrations beginners face, especially when making festive products for Diwali and wedding season.
The good news is that glitter sinking in resin is not a material defect. It's a physics problem, and physics problems have solutions. Once you understand why it happens and which techniques to use, you can keep glitter, sequins, and metallic flakes exactly where you want them β suspended beautifully throughout your piece.
This guide is written specifically for Indian crafters working on coasters, trays, jewellery, and gifting products during festive seasons. Whether you're a beginner or someone who's already made a few pieces, you'll find practical steps here that actually work in Indian room temperatures and humidity conditions.
Quick Answer: Why Glitter Sinks and How to Stop It
If you're short on time, here's the core of what you need to know:
- Glitter and sequins are denser than liquid resin, so gravity pulls them down during the liquid phase.
- The fix is to either use a thicker (higher-viscosity) resin, work in stages (layering), or wait for the resin to partially gel before adding your inclusions.
- Fine glitter suspends more easily than chunky sequins. Metallic flakes sit somewhere in between.
- Temperature matters a lot in India β warmer rooms make resin thinner and speed up sinking.
- Mixing mica powder into your base resin before adding chunky inclusions gives you a coloured, sparkly base that hides any settling.
Why Does Glitter Sink in Resin?
Resin is a liquid when you first mix it. Like any liquid, it follows gravity. Anything you add to it that is denser than the liquid will sink β simple as that.
Glitter particles, especially the heavier polyester or craft glitter types, have more mass than the surrounding resin. Fine cosmetic glitter sinks more slowly because the particles are tiny and the surface area is relatively large for their weight. But chunky glitter, sequins, and metallic glass granules sink fast β sometimes within 15 to 20 minutes in a warm Indian room.
Epoxy resin viscosity (how thick or runny it is) plays a big role here. Most standard epoxy resins start quite fluid and thicken gradually as they cure. The window where the resin is thin enough to pour but thick enough to hold inclusions is called the working window or pot life. In Indian summers, this window shrinks because heat speeds up the curing reaction and makes the resin thinner initially before it gels faster.
If you've had sticky or uncured resin problems alongside this, do read Why Your Resin Is Still Sticky After 24 Hours β and How to Fix It Before You Ruin the Piece β incorrect ratios and temperature both affect how resin behaves with inclusions.
Choosing the Right Resin for Glitter Suspension
Not all resins behave the same way with inclusions. Here's what to look for:
Epoxy Resin
Standard epoxy resin (typically 1:1 or 2:1 ratio by volume) is the most common choice for coasters, trays, and decorative items. Higher-viscosity epoxy formulas hold inclusions better. If you're unsure about ratios, How to Choose the Right Resin Ratio for Your First Project: 1:1 vs 2:1 Explained for Indian Beginners breaks this down clearly.
For glitter suspension, look for epoxy described as "medium viscosity" or "casting resin with extended pot life." A longer pot life gives you more working time before the resin thins out and before inclusions start moving.
UV Resin
UV resin is thicker by nature, which makes it excellent for suspending fine glitter in small pieces like pendants and keychains. Because you cure it under a UV lamp in layers, you have full control. Add glitter to a thin layer, cure it, add another layer. Nothing sinks because each layer is locked in place before the next is poured.
For a detailed comparison, see UV Resin vs Epoxy Resin for Small Moulds: Which One Actually Works Better for Keychains, Pendants, and Jewelry in Indian Humidity?.
Temperature Consideration for Indian Crafters
In cities like Chennai, Mumbai, or Delhi in May and June, room temperature can easily be 32β38Β°C. This makes epoxy resin react faster, which paradoxically makes it thinner at first and then gels quickly. You get a shorter working window. Work in an air-conditioned room if possible, or work in the early morning hours. Also see Deep Pour vs Thin Pour Epoxy in Indian Summers: Why Your Resin Overheats in May and What to Do About It for more on this.
Types of Inclusions: Glitter, Sequins, and Metallic Flakes
Understanding your inclusions helps you choose the right technique. Here's a quick breakdown:
Fine Glitter
Fine glitter has a very small particle size. It suspends relatively well in medium-viscosity resin and creates an all-over shimmer. It's the easiest inclusion to work with for beginners.
Chunky Glitter and Sequins
Sequins are flat, lightweight-looking but actually quite heavy relative to their surface area when it comes to sinking speed. They are beautiful in resin coasters and trays but need the layering technique (covered below) to stay in position.
For festive Diwali products, Flower Polymer Chips (10gm) are a gorgeous option β these decorative chips add a dimensional, floral element that looks stunning in coasters and jewellery trays. Because they're relatively chunky, layering is essential.
Pearl and Moti Inclusions
Round pearl-style inclusions are heavy and will sink quickly in thin resin. The trick is to embed them into a partially gelled layer. Pearl Moti (10gm) adds an elegant touch to wedding gifting products β think pearl-scattered resin trays or jewellery holders.
Metallic Glass Granules
Glass granules are dense and sink fast. However, they catch light beautifully and are worth the extra effort. Silver - Metallic Glass Granules (10gm) look spectacular in white or light-coloured resin pieces for winter wedding season. Use the partial-gel technique described below.
Gold Flakes and Gold Granules
Gold inclusions are the most popular for Diwali and wedding season resin art. Gold Flakes are ultra-thin and actually suspend quite well in medium-viscosity resin β they're light enough that they drift rather than sink straight down. Gold Granules (27gm) are heavier and need the layering approach, but they create a rich, textured look that's perfect for premium gifting products.
Suspension Techniques That Actually Work
Here are the main techniques, ranked from simplest to most controlled:
1. The Partial Gel Technique
This is the most reliable method for keeping glitter from sinking in resin. Mix your resin and hardener correctly, pour it into the mould, and then wait. Check every 20β30 minutes by tilting the mould slightly. When the resin has thickened to a consistency like honey or thick syrup β it moves slowly but is still pourable β that's your moment to add inclusions.
At this stage, the resin is thick enough to hold inclusions in place. Sprinkle your glitter or drop in your sequins and they will stay roughly where they land. Do not stir; gentle pressing with a toothpick to position specific pieces is fine.
Timing varies: in a cool room (24β26Β°C), this gel stage might arrive 3β4 hours after mixing for a standard epoxy. In a warm room (32Β°C+), it could be 1.5β2 hours. Watch the resin, not the clock.
2. The Layering Method
Pour a thin base layer of resin (about 3β5mm). Let it cure to a soft gel β not fully hard, but not liquid either. Then pour a second thin layer on top, immediately add your inclusions, and let that layer gel before adding a final clear top coat.
This sandwiches your inclusions in the middle of the piece. It's the best technique for sequins in resin coasters and trays because the inclusions are physically trapped between two cured layers.
3. Mixing Inclusions into Thickened Resin
Some crafters add a small amount of fumed silica or a resin thickener to their mix to increase viscosity before adding inclusions. This is an advanced technique and requires careful testing, as too much thickener can cause bubbles and cloudiness.
A simpler version: mix mica powder into your resin first. Mica powder adds colour and a slight increase in viscosity. Fine glitter mixed into mica-coloured resin tends to distribute more evenly because the mica particles create a slightly denser medium.
4. UV Resin Layering for Small Pieces
For keychains, pendants, and small jewellery pieces, UV resin is the easiest path. Apply a thin layer, add glitter, cure under the UV lamp for 60β90 seconds, add another layer, cure again. You build up the piece in fully controlled stages. Nothing sinks because each layer is solid before the next is added.
The Layering Method: Step-by-Step for Festive Resin Products
Here's a practical walkthrough for making a glitter-suspended resin coaster:
- Prepare your mould. Wipe it clean and dry. Place it on a level surface β use a spirit level if you have one. An unlevel surface causes resin to pool on one side.
- Mix your resin. Follow the manufacturer's ratio exactly. Mix slowly for 3β4 minutes, scraping the sides and bottom of the cup. Incorrect mixing is the number one cause of sticky resin.
- Add colour to your base. Stir in mica powder or resin pigment. For Diwali products, deep red with gold mica is stunning. For wedding season, blush pink or ivory with pearl shimmer works beautifully.
- Pour Layer 1. Pour about 4β5mm of coloured resin into the mould. Pop bubbles with a heat gun or lighter (held 10β15cm away, quick passes only). Let this layer cure until it's a soft gel β still slightly tacky but not liquid.
- Add your inclusions. Sprinkle gold flakes, glitter, or sequins onto the gelled surface. They will sit on top and be encased when you pour the next layer.
- Pour Layer 2. Mix a fresh batch of clear or lightly tinted resin. Pour gently over the inclusions β pour from a low height and pour slowly to avoid disturbing them. This layer seals the inclusions in place.
- Final cure. Cover the mould loosely (to keep dust off) and leave undisturbed for 24β48 hours depending on your resin brand. Avoid moving the mould during the first 8 hours.
Diwali and Wedding Season Product Ideas
Festive resin products sell very well in India, especially when they look premium and handcrafted. Here are some ideas that work well with suspension techniques:
- Gold-flake resin coasters: Deep burgundy or navy resin with gold flakes suspended in the middle layer. Elegant and easy to make in batches.
- Pearl-scattered jewellery trays: White or cream resin with pearl moti inclusions β perfect as a wedding return gift or bridesmaid gift.
- Diya-shaped resin pieces: Use diya-shaped silicone moulds with red and gold glitter. The partial gel technique keeps the glitter evenly distributed.
- Floral resin bookmarks or keychains: Flower polymer chips embedded in clear UV resin layers. These are fast to make and photograph beautifully for social media.
- Silver granule coasters for winter weddings: White resin with silver metallic glass granules β looks like fresh snow, which is unusual and eye-catching for December wedding season.
For more seasonal ideas, Creating Unique Monsoon Decor: A Step-by-Step Guide to Using Silicone Molds with Resin has some great mould ideas that translate well to festive products too.
Safety Notes for Working with Resin and Inclusions
Resin is safe to use when handled correctly, but there are a few things every crafter should know:
- Ventilation: Always work in a well-ventilated room. Epoxy resin fumes are not pleasant and can cause headaches with prolonged exposure. Open windows, use a fan to direct air away from your face.
- Gloves: Wear nitrile gloves every time. Resin sensitisation is a real issue β repeated skin contact can cause allergic reactions over time, even if you've used resin before without problems.
- Eye protection: Wear safety glasses when pouring resin or using a heat gun. Splashes happen.
- Glitter inhalation: Fine glitter particles can irritate the respiratory system. Avoid pouring glitter in a draft that blows it toward your face. A simple dust mask helps.
- Heat gun safety: Keep heat guns moving β holding one spot too long can yellow or warp the resin surface. Never use an open flame directly on resin.
- Disposal: Cured resin is inert and safe. Uncured resin should not go down the drain. Let any leftover mixed resin cure fully in a disposable cup before throwing it away.
Inclusion Comparison Table
| Inclusion Type | Sinking Speed | Best Technique | Best For | Difficulty Level |
|---|---|---|---|---|
| Fine Glitter | Slow | Mix into resin directly or partial gel | All-over shimmer, backgrounds | Beginner |
| Chunky / Craft Glitter | Medium | Partial gel technique | Focal sparkle, coasters | BeginnerβIntermediate |
| Sequins / Flower Chips | Fast | Layering method | Coasters, trays, jewellery | Intermediate |
| Pearl / Moti | Very Fast | Embed into gelled layer | Wedding gifts, trays | Intermediate |
| Gold / Silver Flakes | SlowβMedium | Mix in at partial gel, or layer | Festive products, premium gifts | Beginner |
| Metallic Glass Granules | Very Fast | Layering method only | Textured coasters, decorative trays | Intermediate |
Frequently Asked Questions
Why does glitter always sink to the bottom of my resin even when I mix it in carefully?
Glitter sinks because it is denser than liquid resin. When resin is freshly mixed, it is still quite fluid, so gravity pulls heavier particles down. The solution is to either use a thicker resin, add your glitter when the resin has partially gelled (become honey-thick), or use the layering method to trap inclusions between cured layers. Mixing carefully doesn't prevent sinking β timing does.
Can I use UV resin to keep glitter suspended without layering?
UV resin is thicker than most epoxy resins, so fine glitter suspends better in it even without layering. However, for chunky glitter or sequins, you'll still want to layer β pour a thin layer, add glitter, cure, then pour the next layer. UV resin's biggest advantage is that each layer cures in 60β90 seconds under a UV lamp, so the process is much faster than waiting for epoxy to gel.
How long should I wait before adding glitter to epoxy resin using the partial gel technique?
This depends on your room temperature and the specific resin brand. As a rough guide: at 24β26Β°C, most standard epoxy resins reach the honey-thick gel stage in 3β5 hours. At 30β35Β°C (common in Indian summers), this can be as little as 1.5β2 hours. Don't rely on the clock β check the resin by gently tilting the mould every 20β30 minutes. When it moves very slowly and doesn't level out immediately, it's ready for inclusions.
Will glitter affect the curing of my resin?
Standard polyester glitter and metallic flakes do not interfere with epoxy resin curing. However, some natural inclusions like dried flowers, certain papers, or organic materials can introduce moisture and inhibit curing. If you're using glitter alongside other inclusions, make sure everything is completely dry before adding it to the resin. Wet inclusions are a common cause of soft spots or sticky patches in finished pieces.
What is the best type of glitter for resin art in India?
Fine polyester glitter (also called cosmetic or craft glitter) is the easiest to suspend and gives a smooth, all-over shimmer. Holographic glitter catches light from multiple angles and is very popular for Diwali products. For a premium look, gold and silver metallic flakes β being ultra-thin β drift rather than sink and create a luxurious effect. Avoid biodegradable glitter in resin as it can discolour or degrade over time within the cured piece.
How do I stop sequins from flipping over or clumping in resin?
Sequins tend to clump when poured in a bunch. Sprinkle them one by one or in very small pinches onto your gelled resin surface rather than dumping a handful at once. If they flip face-down, use a toothpick to gently turn them before the resin sets. Working at the partial gel stage helps because the resin is thick enough to hold the sequin in position once you place it correctly. For coasters with sequins in resin, the layering method gives you the most control.
Wrapping Up
Keeping glitter from sinking in resin comes down to understanding one thing: timing. The liquid phase of resin is your enemy when it comes to suspension. The gel phase is your friend. Once you start working with the resin's natural curing process rather than fighting it, your festive pieces will look exactly the way you imagined them.
For Diwali coasters, wedding trays, and gifting products, the layering method is the most reliable approach. For small jewellery pieces, UV resin with layer-by-layer curing gives you the most control. And for that all-over shimmer effect, mixing fine glitter into your mica-coloured base at the partial gel stage produces results that look professional even in your first few attempts.
Shrebhavi stocks a wide range of inclusions suited for festive resin products β from gold flakes and metallic granules to pearl moti and decorative polymer chips. Start with one or two inclusion types, master the timing, and then layer in more complexity as your confidence grows. Your Diwali and wedding season customers will notice the difference that proper suspension makes.