All you need to know about candles: composition, production and natural alternatives

March 6, 2025

We all have at least one candle in our home. This everyday object is appreciated for its refined aesthetics, subtle fragrances and warm ambience. However, not all candles are created equal in terms of composition and impact on health and the environment.

How do you know if a candle is healthy and environmentally friendly? What are the different types of wax? How do you choose wicks and fragrances? This article guides you through the essential aspects of candle making, and explains how to make your own with natural ingredients.

The different candle-making techniques

There are three main ways to make a candle:

Casting This technique involves pouring liquid wax into a pre-prepared mold. Once solidified, the candle is removed from the mold. It can be used to create a variety of original shapes.
Dipping A wick is repeatedly dipped in a bath of hot wax. With each dip, an additional layer is deposited, resulting in uniform candles.
Filling The simplest method is to pour the melted wax into a container, with the wick centered. This technique is ideal for making jar candles.

Different types of wax

The choice of wax is crucial, as it influences not only combustion but also the quality of the ambient air.

Natural waxes

Beeswax Beeswax: Natural and healthy, it burns slowly and gives off a slightly sweet scent. It is particularly appreciated for its purity and non-toxic qualities.
Plant waxes Vegetable waxes: derived from renewable resources, they are increasingly recommended. Among the most popular:
- Soy wax Biodegradable, non-toxic and clean-burning.
- Coconut wax Appreciated for its softness and excellent fragrance diffusion.
- Rapeseed wax European sustainable alternative, with stable combustion and no black smoke.

Mineral waxes

Kerosene Derived from petroleum, paraffin is widely used in industry, but is less environmentally friendly. It can emit toxic compounds during combustion.

Our recommendation Choose natural waxes for a healthier, more eco-friendly candle.

Which wick to choose?

The wick plays a key role in candle combustion. There are several types:

Cotton wicks Untreated and lead-free, they ensure even combustion.
Wooden wicks Offer a "chimney" effect with a slight crackling sound.
Braided wicks Specific to cast candles and guaranteeing optimal diffusion.

It's best to opt for natural wicks, without chemical treatment, to avoid any emission of harmful substances.

Fragrances: which options to choose?

Fragrances add a sensory touch to candles. However, it is essential to choose non-toxic fragrances.

Essential oils Offer natural fragrance and aromatherapeutic properties. Beware of their flash point, which must be above 65°C to guarantee optimal diffusion without altering olfactory properties.
Natural fragrance oils Designed for candle-making, they guarantee a long-lasting, even scent with no harmful emissions.

Avoid synthetic fragrances containing phthalates or other potentially toxic substances.

Making your own candles: a fun, customizable activity

There are several advantages to making your own candles:

Ingredient control You choose the wax, the wick and the fragrances.
Personalization Create candles to suit your taste and interior.
Cost savings Making your own candles is less expensive than buying quality candles in stores.
Creative family activity A moment of sharing, accessible to all, which can be an idea for a DIY workshop to keep the kids busy.