Candle making: strong-smelling candles that burn clean
Everything you need to make container candles at home or for your brand: choosing wax and wicks, how much fragrance to add and when, curing, test burning and fixing common problems.
Choose your wax
The wax decides the look, the scent throw and how you work.
| Wax | Look & feel | Scent throw | Notes |
|---|---|---|---|
| Soy container wax | Creamy, matte, may ‘frost’ | Good cold throw, gentle hot throw | Natural, popular, needs 1–2 weeks cure |
| Paraffin container wax | Smooth, glossy, takes colour well | Strong hot throw | Cures in a few days, easy to work |
| Soy-paraffin blend | Smooth with fewer flaws | Strong | A good balance for brands |
| Coconut-soy / coconut-apricot | Very creamy and smooth | Excellent | Premium, softer wax |
| Beeswax | Golden, honey smell | Weak with added fragrance | Usually unscented or lightly scented |
| Pillar wax | Hard, holds its shape | Moderate | For free-standing candles, not jars |
Vessels and wicks
The most common reason a candle fails is the wrong wick.
Choose a heat-safe vessel: thick glass made for candles, metal tins or glazed ceramic. Avoid thin decorative glass, which can crack. Measure the inside diameter; the wick must create a melt pool that reaches the edge in about 2–4 hours.
| Jar diameter (inside) | Wick direction | Notes |
|---|---|---|
| 5–6 cm | Small single wick | Votives, small tins |
| 6–8 cm | Medium single wick | Most standard jars |
| 8–9 cm | Large single wick | Test carefully: soot risk |
| 9–11 cm | Two wicks | Spread evenly |
| Over 11 cm | Three wicks | Three-wick bowls |
Heavily fragranced and dark-coloured candles often need a slightly smaller wick; vanilla-rich scents burn hotter. Cotton wicks are standard; wooden wicks give a crackle but need their own testing.
- Pick two or three wick sizes
Based on the supplier’s chart for your wax and diameter.
- Pour one test candle per wick
Same wax, fragrance and load.
- Test burn
Burn 3–4 hours. Check melt pool, flame height and soot.
- Choose
The smallest wick that reaches a full melt pool without a big, flickering flame.
Fragrance load and temperatures
How much oil to add, and when.
Fragrance load is the amount of fragrance oil as a percentage of the wax weight. Most container waxes take 6–10%; some allow up to 12%. More isn’t always stronger: above the wax’s limit, oil can sweat out of the candle and burn poorly.
Candle batch calculator
Weigh, don’t measure. Soy wax is about 0.86–0.9 g/ml, paraffin about 0.9. Add 5% extra for losses in the jug.
| Step | Soy (typical) | Paraffin (typical) |
|---|---|---|
| Melt to | 80–85 °C | 80–85 °C |
| Add fragrance at | 80–85 °C, stir 2 minutes | 75–80 °C, stir 2 minutes |
| Pour at | 55–65 °C | 65–75 °C |
| Cure | 1–2 weeks | 2–5 days |
Making the candle, step by step
A repeatable method for clean, smooth candles.
- Prepare
Clean and warm the jars (a warm jar reduces wet spots). Stick the wicks centred to the base with wick stickers.
- Melt
Melt the weighed wax to about 80–85 °C.
- Add fragrance
Take off the heat, add the weighed fragrance oil and any dye, and stir gently but thoroughly for 2 minutes.
- Cool to pour temperature
Let it cool to your wax’s pour temperature.
- Pour
Pour slowly to avoid air bubbles, leaving 1–1.5 cm headspace. Hold the wick straight with a wick bar or clothes peg.
- Cool slowly
Let candles cool at room temperature, away from fans and cold windows, for 24 hours.
- Trim and cure
Trim wicks to 5–6 mm, close the lids and cure (soy 1–2 weeks) before test burning or selling.
Starter recipe: 10 × 200 ml soy candles
Makes about ten 200 ml jars filled to 85%. Change the batch to scale.
| Material | Parts | % | Amount | Why it’s there |
|---|---|---|---|---|
| Soy container wax | 1350 | 92.53% | – | The candle body |
| Fragrance oil (8%) | 108 | 7.4% | – | Scent |
| Candle dye (optional) | 1 | 0.07% | – | Colour, a few chips |
| Total | 1459 | 100% | – |
Burn testing and safety
A candle isn’t ready to sell until you’ve burned it.
- First burn
Burn until the melt pool reaches the edges (usually 2–4 hours). This sets the ‘memory’ for later burns.
- Watch
Flame should be steady, about 1–2.5 cm tall, with little or no black smoke.
- Check the melt pool
About 0.5–1 cm deep is typical. Much deeper means the wick is too large.
- Measure the throw
Rate cold and hot throw in a closed room at 30 minutes and 2 hours.
- Burn to the end
Test several burns down to the last 1 cm and check the jar doesn’t get too hot.
Safety labels
- Never leave a burning candle unattended.
- Keep away from children, pets and anything that can catch fire.
- Burn on a heat-resistant surface, out of draughts.
- Trim the wick to 5 mm before each burn; stop when 1 cm of wax remains.
- Include the fragrance’s allergen information and hazard statements from its safety data sheet where required.
Troubleshooting
Fix the usual problems quickly.
| Problem | Cause | Fix |
|---|---|---|
| Tunnelling | Wick too small, or first burn too short | Bigger wick; burn longer the first time |
| Mushrooming / soot | Wick too big or not trimmed; too much fragrance or dye | Smaller wick; trim to 5 mm; reduce load |
| Weak hot throw | Not cured, wrong wick, load too low, or oil added too cool | Cure longer; test wicks; add oil at 80–85 °C |
| Sweating (oil on top) | Load above the wax’s limit, or temperature swings | Lower the load; store at stable temperature |
| Frosting (white crystals) | Natural for soy wax | Pour a little cooler; use a blend; it doesn’t affect burning |
| Wet spots (glass) | Wax pulling away from the jar | Warm the jars; cool slowly; it’s cosmetic |
| Sinkholes / cracks | Cooling too fast | Cool slowly; poke relief holes and top up |
| Flame drowns | Wick too small or load too high | Larger wick; lower load |
Final quiz
Questions, answered
Something not covered? Ask us and we will add it to the class.
How much fragrance oil per kg of wax?
Usually 60–100 g per kg of wax (6–10%). Start at 8% and adjust after test burns, staying within the wax’s maximum.
Can I use essential oils or perfume oils in candles?
Use fragrance oils made for candles. Some essential oils have low flash points or weak throw, and perfume oils aren’t always tested for burning.
Why doesn’t my candle smell when it burns?
Usually the candle wasn’t cured long enough, the wick is wrong, or the oil was added too cool. Test these one at a time.
What is the best wax for a candle business in Pakistan?
Many brands use a soy-paraffin blend for strong throw and smooth looks, or premium coconut-soy for luxury lines. Heat can soften soy in summer, so choose a wax with a suitable melt point.
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