Stearin

Stearine is added to candle wax (e.g. paraffin wax or soy wax) to make candles harder, improve their shape and prolong their burning time. Particularly suitable for shaped candles, such as cylindrical or cube candles, as the candles are more durable and easier to handle. Stearine also improves the bonding of candle colours and fragrance oils to the wax, helping the fragrances and colours to remain stable during candle burning.
Stearine is used in candle wax to improve the burning properties of candles, reduce soot formation and prevent melting in hot conditions. Stearine is also added to soaps, for example, to make them harder and increase the amount of foam.

Using stearin with candle wax
Stearine is usually mixed with paraffin, soy wax or beeswax, as it does not work as a candle wax on its own (melting point is too high). Here are the basic proportions and instructions:

• With paraffin 10-30% . 10% stearin provides basic strength and matte finish. 25-30% stearin provides maximum strength and heat resistance.
• With soy wax: less stearin is added, usually 5-10%, because soy wax is already naturally dense.
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  Melting point
  The melting point of stearin is 54-72°C, depending on its origin and purity. A melting temperature of 70-80°C is recommended to ensure uniform mixing with other waxes.