A great variety of candle moulds are available. Latex, metal, polycarbonate plastic, aluminium, polyurethane and silicone are the main materials being used to make these moulds.
Traditionally candle moulds have been made of two piece HIPS plastic moulds. They are made in two halves, one for the front of the mould and one for the back.
The clamping together of the two halves, no matter how well it was done, always resulted with a certain amount of leakage of the hot wax with a resulting seam and flashing in the finished candle.
The newer moulds made with silicone have none of these disadvantages with candles being released from the mould without needing to be cleaned of extraneous wax. Candles with highly decorated surfaces may need to be made with what is called a silicone block mould to capture all the detail.
To release the candle from a block mould a seam is cut down one side of the mould with a sharp knife. This seam unlike the seams seen with plastic moulds are so fine, that with care they can only be seen with difficulty in the finished product.
Up until a few years ago the majority of 3D detailed candle moulds were made with latex. The dipping process used in the manufacture of latex moulds picks up quite fine detail and makes a good mould.
Go to Tech Tips on Supermoulds.com.au for details on how to use latex moulds.
The newer silicone mould s are gradually replacing latex as the price of silicone drops.
Metal Candle Moulds
Most professionals use metal moulds for all their stock straight sided candles. They withstand constant daily use and release candles without any problems. They are more expensive then rubber moulds but are a manufacturing essential.
Aluminium Candle Moulds
Seamless aluminium moulds are used for several of the popular round and square straight sided designs because of the ease of manufacture and durability of aluminium.
Polycarbonate Candle Moulds
This plastic has found a use because of low cost, with pillar and similar designs together with a small range of two piece moulds. The moulds are durable and release easily.
Polyurethane Candle Moulds
This rubber has been used for manufacturing purposes, to make durable taper candle moulds with a great deal of success. Usually a block mould is made of the taper and a seam is cut down one side for release of the candle.
Metal of course withstands heat the best, which is why it is the mould of choice for manufacturing purposes. The life of the rubbers varies and should be tested for their longevity under day to day working conditions.
Hot wax should be treated with great care when pouring into moulds. Moulds should be clamped together firmly with G clamps and secured in an upright position on plenty of newspaper in case of leakage.
Read the casting instructions for 3D rubber moulds on Tech Tips Click here
Older children should only be allowed to cast candles under adequate adult supervison.