In this lesson, we will discuss how to find the ideal candle recipe that works specifically for your materials, conditions, and personal preferences.
What is the perfect candle?
The perfect candle is one that has a strong fragrance, looks visually pleasing, burns evenly, doesn’t smoke, and is safe to use. To combine all these elements in one product, testing is essential. This includes testing wicks, fragrances, dyes, and so on.
How to conduct testing:
When we make a candle, we need to leave it for two weeks and document all details. For example, if you are using Kerasoy wax, Mango and Orange fragrance at 9%, and Stabilo 20 wick, and poured at 46°C. Over these two weeks, the wax will gain its full strength, and the fragrance will intensify. After the two-week period, you can light the candle.
Why you shouldn’t skip the curing process:
The wax is different after 6 hours, 24 hours, and a week of curing, and it will burn differently as well. This means that the same wick can behave differently depending on the curing time.
Let’s imagine this situation: you make a candle, test it the next day, and it burns beautifully to the edges. Everything is great. But then you make several candles in advance and leave them to cure for a month, waiting for sale. When the candle is finally lit by a customer, it doesn’t burn all the way to the edges, but forms a “well” in the center. This affects the fragrance throw and the appearance, and the customer will likely be disappointed. This is the last thing you want.
So, never skip the curing process. It’s the only way to be sure about your product.
What to check when the candle has cured:
1. Does the wick melt the wax to the edges? How long does it take? How hot does the container get?
Before testing the wick, always trim it to 0.5 cm. If the wick is too long, the flame will be too large, causing the container to overheat and making the test inaccurate. If the wick is trimmed too short, it may sink, which could be misinterpreted as the wick being too small for the container, although it might actually be the right size.
The wick should melt the wax to the edges in at least 40 minutes, but no more than 1.5-2 hours. If it doesn’t, use a bigger wick (or try doubling it, if it’s a wooden wick). Wait for 2 weeks and test again. If you don’t want to wait, you can purchase several wicks for different diameters and test them all in one go.
As for the container’s temperature – it shouldn’t overheat too much. Yes, any candle will get hot when lit, but remember that glass can break under excessive heat. It’s important to consider not just the wick size, but also the thickness of the container walls. Thin-walled containers heat up quickly, which can make them unsafe. On the other hand, thicker containers are much safer. For safety, don’t burn any container candle for more than 4 hours at a time.
Which containers are best for candles - link.
2. How does the candle smell?
To test this, leave the room for 20-30 minutes and then return to the space where the candle was lit. Assess the fragrance from a distance and up close to see how strong it is. Another popular method among candle makers is the BLO method (more details in this lesson [link]).
If the candle doesn’t smell, don’t worry. It could be due to the fragrance. Not all fragrances perform well in candles. It could also be the wax, so avoid purchasing large quantities right away. This applies to everything – wax, fragrance oils, wicks. It’s always best to buy small quantities, test them, and only buy larger amounts once you’re happy with the results. This will save you a lot of money.
3. Did frosting appear over time on the candle?
Sometimes, frosting doesn’t appear immediately but only after some time. In this case, you need to adjust the temperatures you were working with or check the dosages of your dye/fragrance oils. However, this is often normal. Natural waxes are prone to crystallization, and this is something that can’t be completely avoided. But if this happens with every candle, then adjustments need to be made to the formula.
These are the minimum parameters you should check when testing container candles.
In many lessons, I mention that you should trim the wick to 0.5 cm. Why is this necessary?
The main reason is that if you don’t trim the wick before testing, you risk missing the correct wick. For example, even a suitable wick, if not trimmed properly, will melt the wax pool faster than it should. For instance, a properly trimmed wick would melt the wax in 50 minutes to an hour, but an untrimmed one will melt it in 30 minutes because the flame is too large. If you set the wick to a smaller size and don’t trim it to the recommended length, it may sink into the wax because it’s not suitable for the candle. This can lead to confusion. To avoid these issues, always trim the wick.
Without trimming the wick, the candle may emit a burnt smell. This happens because soot builds up on the wick after burning. If the candle is extinguished improperly (by suffocating it with a snuffer or lid), the soot buildup increases as the wick continues to smolder. Therefore, always trim the wick to 0.5 cm before lighting the candle.
Pillar candles burn much faster. If the candle is periodically extinguished, the wick is trimmed, and then relit, the burning time can be significantly extended. I include this recommendation for clients, but I conduct tests without trimming the wick, as not every client will take these actions, so it’s best to find the minimal burning time.