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Understanding and Managing Wet Spots in Candle Making
In candle making, "wet spots" may sound like an unusual term, but it’s a common occurrence that many candle makers encounter. A wet spot refers to a visible patch on the glass jar that resembles an air bubble between the wax and the glass surface. While it may seem like a flaw, it’s purely aesthetic and doesn’t impact the candle’s performance in any way.
Wet spots are the result of the wax pulling away from the glass due to temperature changes. As the wax expands and contracts, especially with fluctuating temperatures, it can separate slightly from the glass, leaving the appearance of a wet spot. Once this happens, the wax won’t re-adhere to the glass, leaving that spot visible.
Wet spots typically form as candles cool and set, often appearing overnight if they’re left in an environment with temperature fluctuations. This issue can sometimes be controlled, but due to changes in temperature, both during production and transport, it may still occur.
Choose Quality Wax: Using a high-quality wax with good glass adhesion, such as GW 464 or SoyaLuna Container wax or Soyaluna All Natural, can help minimize the likelihood of wet spots. This type of wax is known for its strong adhesion properties, which reduces the chances of the wax pulling away from the glass.
Adjust Pour Temperature: Pouring wax at the right temperature plays a significant role in reducing wet spots. If you notice wet spots forming as the candle cools, try increasing your pour temperature slightly to help the wax bond better with the glass.
Avoid Temperature Fluctuations: If your candles are setting overnight, place them in a warm, stable environment. Keeping them away from cold drafts or sudden temperature changes can reduce the risk of wax separation.
Storage and Transport Considerations: Even after production, candles can develop wet spots due to climate changes during storage or transportation. Temperature-controlled storage and avoiding extreme conditions can help maintain the candle’s aesthetic quality.
Pre-warming Glass Containers:
Pre-warming the glass jars can help further reduce wet spots. Pre-warming ensures the wax cools evenly and reduces the risk of separation from the glass. Placing the jars in a warm oven briefly or using a heat gun to warm them slightly before pouring the wax could help minimise wet spots occuring.
Impact of Humidity:
Humidity can also play a role in wet spot formation. In highly humid environments, it’s harder to prevent wet spots because of the extra moisture in the air, which can cause subtle changes in the wax. Climate control in the workspace (like using a dehumidifier) could help in humid areas,not only with wet spots but with other common candle issues.
Despite following best practices, wet spots can sometimes still form due to unavoidable factors like ambient temperature changes, air conditioning, or varying store environments. For many candle makers, understanding that wet spots are a natural part of the candle-making process helps keep expectations realistic.
In summary, while wet spots might affect a candle’s visual appeal, they’re entirely cosmetic and don’t influence the burn quality or scent throw of your candles. By using quality materials, controlling pour temperatures, and managing the setting environment, you can reduce the occurrence of wet spots and create candles that look as beautiful as they perform.
