Tried & Tested
About our recipes
The R&D team here at Candle Shack have been working tirelessly for more than a year to create a series of detailed candle recipes to help you get started. We hope that sharing this knowledge will help you grow your business with confidence so that you can make candles that just work.
We have spent more then 30,000 hours testing combinations of fragrance, wax, wick and jars to produce a comprehensive set of recipes that meet all relevant European standards, for Fire Safety and Sooting Behaviour, so you can pour with confidence.
Read on to find out how you to can create great candles.
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Scope & limitation statement
About Candle Shack Recipes
Candle Shack Recipes are approved combinations of wax, fragrance oil, glass size and wick. Each recipe has been developed in Candle Shack’s R&D laboratories to give candles that exhibit good hot and cold throw. Each recipe also has an associated test report to demonstrate that the candles made using the recipe have burn profiles that meet international standards for fire safety and sooting behaviour.
A fragranced container candle is a combination of four basic components – the container itself, the type of wax used, the fragrance oil (the percentage of fragrance oil used is also important), and the wick. The first three components are chosen through personal preference for a hobby or brand. The fourth component, the wick, is selected by the candle maker to ensure that the blend of wax and fragrance oil in the chosen candle glass burns safely and cleanly.
The wick selection process can be confusing, time-consuming, and costly, making it a daunting prospect for anyone who is considering making candles for the first time or for the chandler who is frustrated with the challenge of finding the right wick for their chosen blend. If the wrong type of wick is used, a candle can tunnel, or can have a deep melt pool. Worse still, a poorly wicked candle can cause excessive sooting or a dangerously large flame height.
Candle Shack Recipes offer a simple way to reduce the time and cost of wick selection. Each Candle Shack Recipe is the product of an extensive wick optimisation programme. Test sets of candles based on the recipes have been made and tested in Candle Shack’s R&D laboratories and each recipe meets the European standards for fire safety and for sooting behaviour.
The recipes include candles in 30cl, 20cl or 9cl sizes. The waxes used are CS1 (mineral), RS1 (rapeseed & soy) or RCX (rapeseed & coconut). All fragrance oils used in the recipes are available from Candle Shack’s extensive collection. The wick for each recipe has been selected to give good hot throw and ensure that the candle performance meets standards EN 15493:2019 (Candles - Specification for Fire Safety) and EN 15426:2018 (Candles - Specification for Sooting Behaviour).
Candle Shack Test Reports
The test reports show the results of testing conducted at Candle Shack’s R&D laboratories in accordance with EN 15493:2019 (Candles - Specification for Fire Safety) and EN 15426:2018 (Candles - Specification for Sooting Behaviour).
Each test is conducted on a set of three identical candles in clear glasses. The use of clear glasses allows the candles to be photographed from the outside of the glass, thus allowing the reader to see any hang-up or visible sooting on the candle glass at the end of the fire safety test.
EN 15493:2019 Candles - Specification for Fire Safety.
Testing for Fire Safety measures a range of values as a candle burns from start to finish. Each candle is burned for four hours, with a minimum of one hour between each burn period. The test report records a range of parameters including flame height and aftersmoke time to ensure that the candles meet the requirements of the standard. The test report also gives values for the total burning time and average hourly wax consumption of each candle.
EN 15426:2018 Candles - Specification for Sooting Behaviour
Testing for Sooting Behaviour uses specialised apparatus to record how much soot is deposited on a glass plate after burning a candle below the plate for the first two or three burn cycles of a candle. Each candle is burned for four hours, with a minimum of one hour between each burn period. The recorded value is then converted into an hourly soot index. A candle meets the EN 15426:2018 standard if the average hourly soot index for three sample candles is less than 1.0/h.
All Candle Shack Recipes have been used to create candles that have an hourly soot index of less than 1.0/h. Most have an hourly soot index of less than 0.2/h, indicating that they burn very cleanly.
A candle that has a very low hourly soot index might still show a small amount of soot on the inside of the glass towards the end of the burn. This is normal – the behaviour of a candle during the first few burn cycles is different to its behaviour during the last few burn cycles, where soot is often observed. So, although a candle meets the standard for sooting behaviour, this doesn’t mean that the candle will be completely soot-free.
Scope and Limitation
Each report shows test results for a set of candles made by Candle Shack’s R&D team for that particular recipe. While candles made to the recipe specified on each report would be expected to perform similarly, the test reports are not a guarantee that all candles made using the recipe will burn in exactly the same way.
Variables such as ambient temperature, air flow, or the manufacturing process can affect the burning profile of a candle, and it remains the responsibility of each candle maker to conduct their own testing to ensure that they are satisfied with the performance of their product.
If a recipe is followed but with a coloured glass instead of a clear glass, the performance of the candle would be expected to be broadly in line with that of the clear glass candles tested in the reports. However, this would be the case only if the glass size, fragrance type/quantity, wax type/quantity and wick are identical to those used in the recipe. The candle may behave slightly differently but minor differences between the performance of each individual candle in a test set are normal in any case.
The recipes are based on candles made in glass vessels. If a different type of container is used (e.g. metal, ceramic), this could affect the burn profile of the candle, so a different wick may be required.
There will be more than one type of suitable wick for each candle blend. While the wicks mentioned in each test report are expected to produce candles that have a burn profile that meets fire safety and sooting behaviour standards, there will be other wicks that will also do this. If candle maker would prefer a different size of melt pool or flame height, the wick named in the recipe could be a reasonable starting point for further optimisation. As always, candle makers should test their candles to ensure that they are burning in the desired manner.
Individual candle makers use different production and curing processes and environments. This means that the Candle Shack Recipes and test reports are not a guarantee that all candles made using the recipes will burn in the same way as the candles specified in the reports. Although the recipes offer a convenient route to finding a safe wick, it remains the responsibility of the candle maker to conduct their own testing to demonstrate that their candles burn safely.