We have discussed the importance of proper selection and processing of the wick to be used in your candle. We have also discussed the importance of choosing the right wick-wax. Now we will focus our attention on the wick-clip assembly itself.
We’ll start with the most important properties of the wick as it relates to the wick-clip assembly:
- Uniform Wick Height
- Tails on Wick-Clip Assemblies
- Wick Lean
Uniform Wick Height
A consistent and uniform wick height impacts both the manufacturing and initial use of a candle. If you are filling manually, a varying wick height will cause you to pour more or less wax to leave a 1/4″ of wick exposed. This will affect burn times and if more wax is used, increase costs. In machine filling with consistent wax volumes you will have even worse potential problems. A short wick will leave little wick exposed and will tend to tunnel on initial lighting, whereas too much wick could lead to sooting on the first burn cycle. Not a good start to the enjoyment of an otherwise fine candle.
Tails on Wick-Clip Assemblies
Tails occur when the wick is poorly cut and sticks out the bottom of the clip in a wick-clip assembly. The tail can hamper or even prevent a wick-clip assembly from sitting flat and perpendicular to the floor of the glass in manufacturing. First, this can present a gluing issue. Secondly, although through most of the candle’s life this won’t matter assuming the wick was pulled up on center as the candle hardened, at the end of life when the supporting wax is liquefied it is possible that the wick could start to lean towards the direction of the angled tab. End of life is a time when you most need the candle flame to remain centered in the glass. Anything that could compromise the safety of the consumer’s end of candle life experience should be minimized. There are no tails on Wicks Unlimited’s wick-clip assemblies, guaranteed.
Non-metal cored wicks are prone to excessive leaning when high temperature liquid wax is poured or during the burn when the burn pool is excessively hot and deep, at which point the wick-wax melts away leaving the wick to support itself without the rigidity of the wax. These problems can be addressed by using our “high melt” wick-wax which has a drop melt point of 210 degrees Fahrenheit (99 degrees C).
Now that we have covered the wick in our wick-clip assembly, it is time to turn to the other component of a wick-clip assembly, the clip. By clicking on ‘Clips’ in our navigation bar, you will be introduced to the many different clips that Wicks Unlimited offers. There we discuss the quality of these clips, and what value added benefits that they bring to your product.
But quality as it pertains to the clip does not stop just with the construction of the clip. Here are a few more topics for your consideration:
- The Crimp – A Dedication to Quality
- The “Non-Puncturing Crimp”
- Safety Length Wick-Clips
The Crimp – A Dedication to Quality
The crimp is the final “signature” highlighting the quality of our wick-clip assemblies. We measure the holding power of our crimp in terms of tensile strength, the pounds of pull necessary to separate the wick from the clip.
Our computer controlled machinery will unfailingly puncture-crimp the assembly between 4.5 lbf to 9.5 lbf minimum of tensile strength, individually determined for each specific application. This simply means that our crimp will meet or exceed all normal operating requirements for crimp hold.
Our patented crimping tool does not wear, is omnidirectional and does not require orientation. We have specifically designed our crimping tool’s head to locate the center barrel of the clip and, by using an increased surface area, we exert more pressure on the wick core without shearing the fibers. This insures a good crimp every time, keeping the wick from pulling out.
The “Non-Puncturing Crimp”
Our standard crimp makes several small and one large piercing in the wall of the clip to allow for a tighter gripping of the wick, thereby increasing the overall tensile strength of the crimp. Because there are tears in the wall of the crimp, the liquid wax pool of the candle can be drawn into the clip and continue to fuel the flame. This does not pose a safety concern though, as the all important distance that the flame is maintained from the bottom of the jar is still determined by the height of the clip.
As a safety alternative, clips with an overall height of 6.0 mm (.236″) or more can be crimped using a “Non-Puncturing Crimp.” As the name implies, this special crimp is made higher up the barrel of the clip and does not pierce the metal. Therefore, when the wick-clip assembly is glued to the bottom of the container, the burn pool has no points of entry, and the wick is extinguished when the burn pool level reaches the top of the metal clip.
If you want your candle to shut off at end of life, then a “non-puncturing” Wicks Unlimited crimp gets the job done every time.
Wick-clips with heights over the standard 3.8 mm tall clip bring the candle’s flame higher away from the bottom of the candle. Taller clips with heights of, 6 mm, 10 mm, and 13 mm are available to increase the potential safety of a candle’s “end-of-life” combustion. This increased height also minimizes the potential of the ignition of carbon deposits which may be lying on the floor of the candle hence increasing the overall safety of the candle.
The longer wick-clips are more expensive due to a more involved manufacturing process required to produce them. Likewise, some candle manufacturers may feel that their customers will perceive the additional wax left at the bottom of the candle at the end of its burn as waste, but taller clips combined with our “non-puncturing” crimp are a very effective system for a candle’s end of life safety.