Hot Throw vs Cold Throw: How to Choose Fragrance Oils for Your Candles
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Walk past any well-made candle and you'll notice the scent before you light it. Light it and the smell fills the room within minutes. That's a fragrance oil with both cold throw and hot throw working together.
If you make candles and customers love how they smell on the shelf but complain they barely scent a room when burning — you have a hot throw problem. If they don't notice the candle on the shelf at all, you have a cold throw problem.
Here's how to fix both.
What is cold throw?
Cold throw is the scent a candle gives off when it's not lit. This is what your customer smells when they pick up the jar in store, or when the candle is sitting unlit on a shelf at home.
Cold throw is critical for: retail conversion. Customers buy candles partly with their nose. If your unlit candle smells weak, you lose the sale.
What is hot throw?
Hot throw is the scent the candle releases when it's lit and the wax pool is melted. This is what fills the room.
Hot throw is critical for: customer satisfaction and repeat purchases. A candle that doesn't scent the room when burning gets bad reviews — even if it smelled great on the shelf.
Why fragrances differ
Different fragrance categories naturally throw differently. Here's a rough guide:
- Florals (rose, jasmine, lavender, gardenia) — strong cold throw, moderate hot throw
- Citrus and fresh (lemon, lime, ocean, sea salt) — great cold throw, but the hot throw can fade fast
- Gourmand (vanilla, chocolate, caramel, coffee) — moderate cold throw, very strong hot throw
- Woody and spicy (sandalwood, cedar, oud, cinnamon) — weaker cold throw, excellent long-lasting hot throw
- Fruity (strawberry, peach, apple, mango) — strong cold throw, moderate hot throw
How to maximize hot throw
- Use enough fragrance oil. The most common mistake. Recommended fragrance load: 6–10% by wax weight. If your wax is 200g, that's 12–20g of fragrance oil. Most beginners use too little.
- Add fragrance at the right temperature. Most fragrance oils flash off if added when the wax is too hot. Wait until the wax cools to 65–70°C before adding.
- Use the right wick size. Too small a wick means the wax pool doesn't reach the edges, so the fragrance isn't releasing properly. The wax pool should be 5–10mm deep within an hour.
- Cure your candles for 48–72 hours. Soy wax especially needs time for the fragrance to bind into the wax. Burning a fresh-poured candle gives weak hot throw.
How to maximize cold throw
- Pick fragrances with naturally strong top notes. Florals, citrus, and fruits all hit your nose immediately.
- Pour into wider-mouth containers. A wide jar releases scent better when unlit than a narrow one. Same fragrance, different cold throw.
- Keep candles uncapped on shelves. Closed lids trap scent. If you can, leave candles open in store displays.
- Layer fragrance complexity. A candle with one note has weak cold throw. Even slight blending (e.g., vanilla + a hint of caramel) gives more depth at the nose.
Testing fragrances yourself
Don't trust supplier claims about throw — every fragrance behaves differently in different waxes. Run your own tests:
- Pour 3 small test candles with the same fragrance at 6%, 8%, and 10% load.
- Cure for 48 hours.
- Smell each unlit (cold throw test).
- Burn each in a closed room for 30 minutes (hot throw test).
- Pick the load that smells right.
Recommended fragrance oils for Indian makers
For makers starting out, we recommend a mix of strong-throw fragrances:
- French Vanilla — universal gourmand, excellent hot throw
- Rose — traditional Indian floral, strong cold throw
- Jasmine — classic Indian floral, balanced cold and hot throw
- Lavender — calming, very strong cold throw
- Warm Chocolate — gourmand, bold hot throw
Or browse our complete fragrance oil collection — 80+ scents, all formulated for Indian preferences and tested for performance in Indian climate.
Questions?
Message us on WhatsApp — we'll recommend specific fragrances for your candle style and target customer.