The holiday season is coming up meaning the candle sales are rising. In stores you will find the exotic names such as ‘Christmas magic’, ‘Frosted Blackberry & Cedar wood’ and ‘The Perfect Tree’. We love scented candles and especially the Christmas specific versions really help to get a festive ambience. Candles with nice aromas like fir, cinnamon, cloves and pine cone are always favourite.
But how do you get this nice scent into a candle? Let’s find out.
The candle industry
There are many innovations that have led to the modern candle industry; a few standout moments are:
In the 1820’s French Chemist Michel Eugene Chevreul discovered how to extract stearic acid from animal fatty acids. This discovery led to the development of stearin wax. A hard, durable and clean burning wax that remains popular today.
In 1834, inventor Joseph Morgan developed a machine for continuous production. A cylinder with a moveable piston ejected candles as they solidified. Mechanized production caused that production cost fell and candles became a commodity for the masses Mechanized production means that production costs fall and it became a commodity for the masses.
In the 1850’s, scientists learned how to separate the naturally occurring waxy substance from petroleum; Paraffin was born. A problem with a low melting point was removed by the addition of stearic acid.
When the light bulb was introduced in 1879, the demand for candles began to decline.
- In the late 20th century candles saw a resurgence of popularity as they were re-introduced as gifts and additions to the home for creating mood and ambiance.
A variety in candles
The growth of this industry has been huge and candles now come in an variety of sizes, shapes, from tapers, pillars and tea lights to container/jar candles, floating, outdoor and novelty candles and of course Christmas candles.
Research indicates that the most important factors affecting candle sales are scent, colour, cost and shape. Approximately 35% of candles sales occur during the Christmas season. An estimated 75 to 80%of candles sold are scented. Some candle manufactures offer between 1000 and 2000 varieties of candles in their product lines.
The process of adding fragrances
Candle manufactures work closely with fragrance companies to develop scented formulations that are not only pleasing, but will burn safely and properly. These may be derived from essential oils or synthetic aroma chemicals.
The fragrance materials are high-quality; fragrances that are found in many perfumes, bath soaps, lotions and shampoos. The addition of fragrance to a candle should be carefully monitored to ensure the candle burns cleanly and safely.
During the candle manufacture process, colours, fragrances and additives are normally mixed together in hot liquid state. Typical perfumes, additives, colours and protection chemicals are liquid. Precise dosing of the additives leads to operational efficiency and the minimization of unnecessary waste.
Fragrances are frequently added manually by process operators. As with all manual processes this can be expensive. It also carries multiple risks; spillage and under and over dosing of these expensive chemicals.
CORI-FILL dosing technology
With the CORI-FILL dosing technology, Bronkhorst offers an easy-to-use setup to dose these fragrances. By combining a Coriolis mass flow meter with a pump or a suitable valve, fluids can be dosed continuously or as a batch into the container/jar or mould of the candle with high reproducibility. These systems can be integrated or used as an add-on in already existing processes and production lines.
Tips from the candles experts
There is an art to burning a candle properly and safely. You can generally tell just by looking at it. You should see:
- A calm, steady flame
- No flickering or wisps of smoke
- No flare ups or leaping flames
- Remember, a lighted candle is an open flame. Be careful!